/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/three-array-sum.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 18:12:21,324 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 18:12:21,325 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 18:12:21,350 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-09 18:12:21,394 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-09 18:12:21,429 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 18:12:21,429 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 18:12:21,430 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 18:12:21,430 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 18:12:21,432 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 18:12:21,432 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 18:12:21,432 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 18:12:21,432 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 18:12:21,432 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 18:12:21,433 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 18:12:21,433 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 18:12:21,433 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 18:12:21,434 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 18:12:21,434 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 18:12:21,434 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 18:12:21,434 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 18:12:21,434 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 18:12:21,434 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 18:12:21,434 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 18:12:21,435 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 18:12:21,435 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 18:12:21,435 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 18:12:21,435 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 18:12:21,435 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 18:12:21,435 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 18:12:21,435 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 18:12:21,436 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 18:12:21,436 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 18:12:21,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 18:12:21,436 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 18:12:21,436 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 18:12:21,436 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 18:12:21,747 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 18:12:21,773 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 18:12:21,775 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 18:12:21,776 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 18:12:21,778 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 18:12:21,779 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/three-array-sum.wvr.bpl [2021-07-09 18:12:21,779 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/three-array-sum.wvr.bpl' [2021-07-09 18:12:22,124 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 18:12:22,125 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 18:12:22,129 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 18:12:22,129 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 18:12:22,129 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 18:12:22,138 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:12:22" (1/1) ... [2021-07-09 18:12:22,143 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:12:22" (1/1) ... [2021-07-09 18:12:22,149 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 18:12:22,156 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 18:12:22,156 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 18:12:22,156 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 18:12:22,162 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:12:22" (1/1) ... [2021-07-09 18:12:22,162 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:12:22" (1/1) ... [2021-07-09 18:12:22,163 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:12:22" (1/1) ... [2021-07-09 18:12:22,163 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:12:22" (1/1) ... [2021-07-09 18:12:22,168 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:12:22" (1/1) ... [2021-07-09 18:12:22,172 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:12:22" (1/1) ... [2021-07-09 18:12:22,173 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:12:22" (1/1) ... [2021-07-09 18:12:22,176 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 18:12:22,177 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 18:12:22,177 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 18:12:22,177 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 18:12:22,178 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:12:22" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 18:12:22,279 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 18:12:22,280 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 18:12:22,280 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 18:12:22,280 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 18:12:22,280 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 18:12:22,281 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 18:12:22,281 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 18:12:22,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 18:12:22,281 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 18:12:22,281 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-09 18:12:22,281 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-09 18:12:22,281 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-09 18:12:22,282 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-09 18:12:22,555 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 18:12:22,555 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-09 18:12:22,557 INFO L202 PluginConnector]: Adding new model three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 06:12:22 BoogieIcfgContainer [2021-07-09 18:12:22,557 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 18:12:22,558 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 18:12:22,558 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 18:12:22,561 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 18:12:22,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:12:22" (1/2) ... [2021-07-09 18:12:22,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d117a82 and model type three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 06:12:22, skipping insertion in model container [2021-07-09 18:12:22,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 06:12:22" (2/2) ... [2021-07-09 18:12:22,563 INFO L111 eAbstractionObserver]: Analyzing ICFG three-array-sum.wvr.bpl [2021-07-09 18:12:22,567 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 18:12:22,567 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 18:12:22,568 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 18:12:22,568 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 18:12:22,602 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-07-09 18:12:22,620 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-07-09 18:12:22,644 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 18:12:22,644 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 18:12:22,645 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 18:12:22,646 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 18:12:22,646 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 18:12:22,646 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 18:12:22,646 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 18:12:22,646 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 18:12:22,659 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 35 places, 29 transitions, 82 flow [2021-07-09 18:12:22,693 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 131 states, 130 states have (on average 3.023076923076923) internal successors, (393), 130 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:22,696 INFO L276 IsEmpty]: Start isEmpty. Operand has 131 states, 130 states have (on average 3.023076923076923) internal successors, (393), 130 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:22,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 18:12:22,710 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:22,710 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:22,711 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:22,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:22,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1455741431, now seen corresponding path program 1 times [2021-07-09 18:12:22,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:22,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495480616] [2021-07-09 18:12:22,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:22,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:23,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:23,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:23,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495480616] [2021-07-09 18:12:23,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495480616] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:12:23,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:12:23,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-09 18:12:23,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292267081] [2021-07-09 18:12:23,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 18:12:23,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:23,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 18:12:23,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:12:23,031 INFO L87 Difference]: Start difference. First operand has 131 states, 130 states have (on average 3.023076923076923) internal successors, (393), 130 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:23,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:23,085 INFO L93 Difference]: Finished difference Result 257 states and 781 transitions. [2021-07-09 18:12:23,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 18:12:23,087 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 18:12:23,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:23,098 INFO L225 Difference]: With dead ends: 257 [2021-07-09 18:12:23,098 INFO L226 Difference]: Without dead ends: 230 [2021-07-09 18:12:23,099 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 63.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:12:23,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-07-09 18:12:23,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 188. [2021-07-09 18:12:23,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 3.0802139037433154) internal successors, (576), 187 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:23,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 576 transitions. [2021-07-09 18:12:23,165 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 576 transitions. Word has length 16 [2021-07-09 18:12:23,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:23,166 INFO L482 AbstractCegarLoop]: Abstraction has 188 states and 576 transitions. [2021-07-09 18:12:23,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:23,166 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 576 transitions. [2021-07-09 18:12:23,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 18:12:23,168 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:23,169 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:23,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 18:12:23,169 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:23,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:23,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1521254665, now seen corresponding path program 1 times [2021-07-09 18:12:23,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:23,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450718021] [2021-07-09 18:12:23,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:23,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:23,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:23,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:23,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450718021] [2021-07-09 18:12:23,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450718021] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:12:23,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:12:23,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 18:12:23,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631241199] [2021-07-09 18:12:23,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 18:12:23,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:23,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 18:12:23,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:12:23,253 INFO L87 Difference]: Start difference. First operand 188 states and 576 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:23,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:23,319 INFO L93 Difference]: Finished difference Result 355 states and 1087 transitions. [2021-07-09 18:12:23,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 18:12:23,323 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 18:12:23,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:23,328 INFO L225 Difference]: With dead ends: 355 [2021-07-09 18:12:23,328 INFO L226 Difference]: Without dead ends: 355 [2021-07-09 18:12:23,329 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:12:23,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-07-09 18:12:23,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 213. [2021-07-09 18:12:23,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 3.1792452830188678) internal successors, (674), 212 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:23,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 674 transitions. [2021-07-09 18:12:23,359 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 674 transitions. Word has length 18 [2021-07-09 18:12:23,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:23,360 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 674 transitions. [2021-07-09 18:12:23,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:23,360 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 674 transitions. [2021-07-09 18:12:23,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 18:12:23,374 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:23,374 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:23,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-09 18:12:23,375 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:23,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:23,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1294033285, now seen corresponding path program 2 times [2021-07-09 18:12:23,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:23,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089133785] [2021-07-09 18:12:23,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:23,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:23,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:23,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:23,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089133785] [2021-07-09 18:12:23,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089133785] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:12:23,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:12:23,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 18:12:23,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197401301] [2021-07-09 18:12:23,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:12:23,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:23,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:12:23,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:12:23,413 INFO L87 Difference]: Start difference. First operand 213 states and 674 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:23,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:23,481 INFO L93 Difference]: Finished difference Result 450 states and 1348 transitions. [2021-07-09 18:12:23,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 18:12:23,481 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 18:12:23,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:23,484 INFO L225 Difference]: With dead ends: 450 [2021-07-09 18:12:23,484 INFO L226 Difference]: Without dead ends: 450 [2021-07-09 18:12:23,485 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:12:23,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-07-09 18:12:23,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 235. [2021-07-09 18:12:23,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 3.1837606837606836) internal successors, (745), 234 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:23,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 745 transitions. [2021-07-09 18:12:23,498 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 745 transitions. Word has length 18 [2021-07-09 18:12:23,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:23,498 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 745 transitions. [2021-07-09 18:12:23,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:23,499 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 745 transitions. [2021-07-09 18:12:23,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 18:12:23,500 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:23,500 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:23,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-09 18:12:23,500 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:23,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:23,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1381326531, now seen corresponding path program 3 times [2021-07-09 18:12:23,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:23,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033796812] [2021-07-09 18:12:23,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:23,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:23,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:23,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:23,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033796812] [2021-07-09 18:12:23,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033796812] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:12:23,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:12:23,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 18:12:23,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967947389] [2021-07-09 18:12:23,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 18:12:23,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:23,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 18:12:23,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:12:23,533 INFO L87 Difference]: Start difference. First operand 235 states and 745 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:23,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:23,570 INFO L93 Difference]: Finished difference Result 349 states and 1037 transitions. [2021-07-09 18:12:23,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 18:12:23,570 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 18:12:23,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:23,572 INFO L225 Difference]: With dead ends: 349 [2021-07-09 18:12:23,572 INFO L226 Difference]: Without dead ends: 345 [2021-07-09 18:12:23,573 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:12:23,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-07-09 18:12:23,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 274. [2021-07-09 18:12:23,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 3.128205128205128) internal successors, (854), 273 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:23,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 854 transitions. [2021-07-09 18:12:23,597 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 854 transitions. Word has length 18 [2021-07-09 18:12:23,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:23,597 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 854 transitions. [2021-07-09 18:12:23,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:23,598 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 854 transitions. [2021-07-09 18:12:23,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:12:23,599 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:23,599 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:23,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-09 18:12:23,599 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:23,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:23,599 INFO L82 PathProgramCache]: Analyzing trace with hash -392615855, now seen corresponding path program 1 times [2021-07-09 18:12:23,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:23,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884185687] [2021-07-09 18:12:23,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:23,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:23,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:23,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:23,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884185687] [2021-07-09 18:12:23,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884185687] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:12:23,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:12:23,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 18:12:23,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534715775] [2021-07-09 18:12:23,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 18:12:23,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:23,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 18:12:23,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:12:23,654 INFO L87 Difference]: Start difference. First operand 274 states and 854 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:23,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:23,732 INFO L93 Difference]: Finished difference Result 345 states and 1038 transitions. [2021-07-09 18:12:23,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 18:12:23,733 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:12:23,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:23,736 INFO L225 Difference]: With dead ends: 345 [2021-07-09 18:12:23,736 INFO L226 Difference]: Without dead ends: 307 [2021-07-09 18:12:23,737 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:12:23,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-07-09 18:12:23,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 276. [2021-07-09 18:12:23,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 3.036363636363636) internal successors, (835), 275 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:23,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 835 transitions. [2021-07-09 18:12:23,764 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 835 transitions. Word has length 19 [2021-07-09 18:12:23,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:23,764 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 835 transitions. [2021-07-09 18:12:23,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:23,764 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 835 transitions. [2021-07-09 18:12:23,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:12:23,766 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:23,766 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:23,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-09 18:12:23,766 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:23,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:23,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1166540627, now seen corresponding path program 2 times [2021-07-09 18:12:23,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:23,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51626366] [2021-07-09 18:12:23,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:23,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:23,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:23,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:23,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51626366] [2021-07-09 18:12:23,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51626366] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:12:23,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:12:23,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-09 18:12:23,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804609773] [2021-07-09 18:12:23,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 18:12:23,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:23,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 18:12:23,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:12:23,808 INFO L87 Difference]: Start difference. First operand 276 states and 835 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:23,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:23,821 INFO L93 Difference]: Finished difference Result 257 states and 747 transitions. [2021-07-09 18:12:23,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 18:12:23,824 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:12:23,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:23,826 INFO L225 Difference]: With dead ends: 257 [2021-07-09 18:12:23,826 INFO L226 Difference]: Without dead ends: 241 [2021-07-09 18:12:23,826 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:12:23,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-07-09 18:12:23,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 231. [2021-07-09 18:12:23,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 3.017391304347826) internal successors, (694), 230 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:23,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 694 transitions. [2021-07-09 18:12:23,835 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 694 transitions. Word has length 19 [2021-07-09 18:12:23,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:23,835 INFO L482 AbstractCegarLoop]: Abstraction has 231 states and 694 transitions. [2021-07-09 18:12:23,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:23,835 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 694 transitions. [2021-07-09 18:12:23,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 18:12:23,836 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:23,836 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:23,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-07-09 18:12:23,837 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:23,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:23,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1387615523, now seen corresponding path program 1 times [2021-07-09 18:12:23,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:23,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881155553] [2021-07-09 18:12:23,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:23,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:23,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:12:23,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:23,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881155553] [2021-07-09 18:12:23,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881155553] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:23,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240794120] [2021-07-09 18:12:23,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:23,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:23,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2021-07-09 18:12:23,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:24,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:12:24,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240794120] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:24,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:24,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-07-09 18:12:24,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288194051] [2021-07-09 18:12:24,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:12:24,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:24,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:12:24,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:12:24,076 INFO L87 Difference]: Start difference. First operand 231 states and 694 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:24,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:24,139 INFO L93 Difference]: Finished difference Result 295 states and 908 transitions. [2021-07-09 18:12:24,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 18:12:24,140 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 18:12:24,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:24,143 INFO L225 Difference]: With dead ends: 295 [2021-07-09 18:12:24,143 INFO L226 Difference]: Without dead ends: 295 [2021-07-09 18:12:24,143 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 26.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:12:24,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-07-09 18:12:24,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 203. [2021-07-09 18:12:24,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 3.0247524752475248) internal successors, (611), 202 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:24,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 611 transitions. [2021-07-09 18:12:24,155 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 611 transitions. Word has length 20 [2021-07-09 18:12:24,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:24,155 INFO L482 AbstractCegarLoop]: Abstraction has 203 states and 611 transitions. [2021-07-09 18:12:24,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:24,156 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 611 transitions. [2021-07-09 18:12:24,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:12:24,157 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:24,157 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:24,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-07-09 18:12:24,373 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:24,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:24,373 INFO L82 PathProgramCache]: Analyzing trace with hash 795815307, now seen corresponding path program 1 times [2021-07-09 18:12:24,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:24,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920892260] [2021-07-09 18:12:24,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:24,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:24,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:12:24,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:24,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920892260] [2021-07-09 18:12:24,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920892260] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:24,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997507275] [2021-07-09 18:12:24,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:24,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:24,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2021-07-09 18:12:24,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:24,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:12:24,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997507275] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:24,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:24,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-07-09 18:12:24,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623256139] [2021-07-09 18:12:24,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:12:24,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:24,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:12:24,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:12:24,559 INFO L87 Difference]: Start difference. First operand 203 states and 611 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:24,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:24,638 INFO L93 Difference]: Finished difference Result 280 states and 853 transitions. [2021-07-09 18:12:24,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 18:12:24,639 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 18:12:24,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:24,641 INFO L225 Difference]: With dead ends: 280 [2021-07-09 18:12:24,641 INFO L226 Difference]: Without dead ends: 280 [2021-07-09 18:12:24,641 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 40.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:12:24,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-07-09 18:12:24,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 215. [2021-07-09 18:12:24,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 3.0233644859813085) internal successors, (647), 214 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:24,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 647 transitions. [2021-07-09 18:12:24,649 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 647 transitions. Word has length 21 [2021-07-09 18:12:24,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:24,649 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 647 transitions. [2021-07-09 18:12:24,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:24,649 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 647 transitions. [2021-07-09 18:12:24,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:12:24,650 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:24,651 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:24,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:24,875 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:24,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:24,875 INFO L82 PathProgramCache]: Analyzing trace with hash -195443725, now seen corresponding path program 1 times [2021-07-09 18:12:24,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:24,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998400764] [2021-07-09 18:12:24,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:24,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:24,958 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:24,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:24,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998400764] [2021-07-09 18:12:24,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998400764] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:24,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819209505] [2021-07-09 18:12:24,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:25,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:25,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:12:25,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:25,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-07-09 18:12:25,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:25,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:25,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 18:12:25,158 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:25,163 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:25,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-07-09 18:12:25,168 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:25,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:25,174 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:12:25,174 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:29, output treesize:14 [2021-07-09 18:12:25,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 18:12:25,221 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:25,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:25,224 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:12:25,224 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:5 [2021-07-09 18:12:25,248 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:25,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819209505] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:25,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:25,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-09 18:12:25,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397084015] [2021-07-09 18:12:25,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:12:25,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:25,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:12:25,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:12:25,250 INFO L87 Difference]: Start difference. First operand 215 states and 647 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:25,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:25,350 INFO L93 Difference]: Finished difference Result 476 states and 1460 transitions. [2021-07-09 18:12:25,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 18:12:25,351 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:12:25,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:25,354 INFO L225 Difference]: With dead ends: 476 [2021-07-09 18:12:25,354 INFO L226 Difference]: Without dead ends: 449 [2021-07-09 18:12:25,354 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 67.3ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:12:25,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-07-09 18:12:25,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 314. [2021-07-09 18:12:25,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 3.073482428115016) internal successors, (962), 313 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:25,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 962 transitions. [2021-07-09 18:12:25,365 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 962 transitions. Word has length 23 [2021-07-09 18:12:25,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:25,366 INFO L482 AbstractCegarLoop]: Abstraction has 314 states and 962 transitions. [2021-07-09 18:12:25,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:25,366 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 962 transitions. [2021-07-09 18:12:25,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:12:25,367 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:25,367 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:25,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:25,589 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:25,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:25,589 INFO L82 PathProgramCache]: Analyzing trace with hash 444763657, now seen corresponding path program 2 times [2021-07-09 18:12:25,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:25,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138567069] [2021-07-09 18:12:25,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:25,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:25,723 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:25,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:25,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138567069] [2021-07-09 18:12:25,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138567069] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:25,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397762589] [2021-07-09 18:12:25,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:25,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:12:25,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:25,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:12:25,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:25,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-07-09 18:12:25,829 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:25,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:25,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:12:25,840 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-07-09 18:12:25,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 18:12:25,882 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:25,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:25,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:12:25,890 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:20 [2021-07-09 18:12:25,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-07-09 18:12:25,926 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:25,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:25,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-07-09 18:12:25,937 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:25,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:25,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:12:25,944 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:29, output treesize:11 [2021-07-09 18:12:25,970 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:25,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397762589] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:25,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:25,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-07-09 18:12:25,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450481761] [2021-07-09 18:12:25,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 18:12:25,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:25,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 18:12:25,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:12:25,972 INFO L87 Difference]: Start difference. First operand 314 states and 962 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:26,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:26,052 INFO L93 Difference]: Finished difference Result 517 states and 1600 transitions. [2021-07-09 18:12:26,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 18:12:26,052 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:12:26,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:26,055 INFO L225 Difference]: With dead ends: 517 [2021-07-09 18:12:26,055 INFO L226 Difference]: Without dead ends: 490 [2021-07-09 18:12:26,056 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 90.8ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:12:26,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-07-09 18:12:26,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 366. [2021-07-09 18:12:26,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 3.084931506849315) internal successors, (1126), 365 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:26,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1126 transitions. [2021-07-09 18:12:26,067 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1126 transitions. Word has length 23 [2021-07-09 18:12:26,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:26,067 INFO L482 AbstractCegarLoop]: Abstraction has 366 states and 1126 transitions. [2021-07-09 18:12:26,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:26,067 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1126 transitions. [2021-07-09 18:12:26,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:12:26,068 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:26,069 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:26,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:26,292 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:26,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:26,292 INFO L82 PathProgramCache]: Analyzing trace with hash -674031635, now seen corresponding path program 3 times [2021-07-09 18:12:26,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:26,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816681269] [2021-07-09 18:12:26,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:26,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:26,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:26,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:26,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816681269] [2021-07-09 18:12:26,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816681269] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:26,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008019402] [2021-07-09 18:12:26,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:26,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:12:26,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:26,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:12:26,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:26,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-07-09 18:12:26,466 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:26,476 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:26,477 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:12:26,477 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-07-09 18:12:26,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-07-09 18:12:26,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:26,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:26,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-07-09 18:12:26,536 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:26,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:26,543 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:12:26,543 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:32, output treesize:18 [2021-07-09 18:12:26,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-09 18:12:26,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:26,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:26,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:12:26,576 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:5 [2021-07-09 18:12:26,618 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:26,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008019402] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:26,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:26,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-09 18:12:26,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218647957] [2021-07-09 18:12:26,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:12:26,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:26,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:12:26,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:12:26,623 INFO L87 Difference]: Start difference. First operand 366 states and 1126 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:26,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:26,694 INFO L93 Difference]: Finished difference Result 572 states and 1775 transitions. [2021-07-09 18:12:26,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 18:12:26,694 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:12:26,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:26,697 INFO L225 Difference]: With dead ends: 572 [2021-07-09 18:12:26,697 INFO L226 Difference]: Without dead ends: 545 [2021-07-09 18:12:26,698 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 75.0ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:12:26,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-07-09 18:12:26,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 366. [2021-07-09 18:12:26,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 3.084931506849315) internal successors, (1126), 365 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:26,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1126 transitions. [2021-07-09 18:12:26,709 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1126 transitions. Word has length 23 [2021-07-09 18:12:26,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:26,710 INFO L482 AbstractCegarLoop]: Abstraction has 366 states and 1126 transitions. [2021-07-09 18:12:26,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:26,710 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1126 transitions. [2021-07-09 18:12:26,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:12:26,711 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:26,711 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:26,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-07-09 18:12:26,925 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:26,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:26,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1363410863, now seen corresponding path program 4 times [2021-07-09 18:12:26,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:26,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719971158] [2021-07-09 18:12:26,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:26,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:26,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:26,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:26,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719971158] [2021-07-09 18:12:26,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719971158] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:26,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724993391] [2021-07-09 18:12:26,967 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:27,008 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:12:27,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:27,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 18:12:27,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:27,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:27,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724993391] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:27,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:27,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-07-09 18:12:27,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156746920] [2021-07-09 18:12:27,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 18:12:27,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:27,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 18:12:27,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:12:27,059 INFO L87 Difference]: Start difference. First operand 366 states and 1126 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:27,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:27,154 INFO L93 Difference]: Finished difference Result 886 states and 2662 transitions. [2021-07-09 18:12:27,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:12:27,155 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:12:27,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:27,160 INFO L225 Difference]: With dead ends: 886 [2021-07-09 18:12:27,160 INFO L226 Difference]: Without dead ends: 886 [2021-07-09 18:12:27,160 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 46.2ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:12:27,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2021-07-09 18:12:27,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 517. [2021-07-09 18:12:27,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 3.203488372093023) internal successors, (1653), 516 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:27,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 1653 transitions. [2021-07-09 18:12:27,177 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 1653 transitions. Word has length 25 [2021-07-09 18:12:27,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:27,178 INFO L482 AbstractCegarLoop]: Abstraction has 517 states and 1653 transitions. [2021-07-09 18:12:27,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:27,178 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 1653 transitions. [2021-07-09 18:12:27,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:12:27,180 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:27,180 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:27,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:27,397 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:27,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:27,397 INFO L82 PathProgramCache]: Analyzing trace with hash -2085469245, now seen corresponding path program 5 times [2021-07-09 18:12:27,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:27,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470558166] [2021-07-09 18:12:27,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:27,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:27,451 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:27,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:27,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470558166] [2021-07-09 18:12:27,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470558166] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:27,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197145874] [2021-07-09 18:12:27,452 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:27,497 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:12:27,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:27,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 18:12:27,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:27,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:12:27,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197145874] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:27,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:27,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-07-09 18:12:27,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140041123] [2021-07-09 18:12:27,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:12:27,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:27,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:12:27,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:12:27,576 INFO L87 Difference]: Start difference. First operand 517 states and 1653 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:28,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:28,354 INFO L93 Difference]: Finished difference Result 1264 states and 3790 transitions. [2021-07-09 18:12:28,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 18:12:28,354 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:12:28,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:28,379 INFO L225 Difference]: With dead ends: 1264 [2021-07-09 18:12:28,379 INFO L226 Difference]: Without dead ends: 1264 [2021-07-09 18:12:28,380 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 441.1ms TimeCoverageRelationStatistics Valid=389, Invalid=1333, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:12:28,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2021-07-09 18:12:28,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 771. [2021-07-09 18:12:28,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 770 states have (on average 3.177922077922078) internal successors, (2447), 770 states have internal predecessors, (2447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:28,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 2447 transitions. [2021-07-09 18:12:28,406 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 2447 transitions. Word has length 25 [2021-07-09 18:12:28,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:28,407 INFO L482 AbstractCegarLoop]: Abstraction has 771 states and 2447 transitions. [2021-07-09 18:12:28,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:28,407 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 2447 transitions. [2021-07-09 18:12:28,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:12:28,409 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:28,409 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:28,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:28,625 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:28,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:28,625 INFO L82 PathProgramCache]: Analyzing trace with hash 469573205, now seen corresponding path program 6 times [2021-07-09 18:12:28,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:28,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359893418] [2021-07-09 18:12:28,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:28,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:28,665 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:28,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:28,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359893418] [2021-07-09 18:12:28,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359893418] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:28,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201747554] [2021-07-09 18:12:28,666 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:28,699 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:12:28,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:28,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:12:28,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:28,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:12:28,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201747554] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:28,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:28,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-07-09 18:12:28,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060926408] [2021-07-09 18:12:28,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:12:28,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:28,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:12:28,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:12:28,774 INFO L87 Difference]: Start difference. First operand 771 states and 2447 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:29,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:29,303 INFO L93 Difference]: Finished difference Result 2477 states and 7775 transitions. [2021-07-09 18:12:29,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:12:29,304 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:12:29,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:29,317 INFO L225 Difference]: With dead ends: 2477 [2021-07-09 18:12:29,317 INFO L226 Difference]: Without dead ends: 2451 [2021-07-09 18:12:29,318 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 256.0ms TimeCoverageRelationStatistics Valid=251, Invalid=741, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:12:29,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2451 states. [2021-07-09 18:12:29,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2451 to 1175. [2021-07-09 18:12:29,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1175 states, 1174 states have (on average 3.4148211243611586) internal successors, (4009), 1174 states have internal predecessors, (4009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:29,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1175 states to 1175 states and 4009 transitions. [2021-07-09 18:12:29,372 INFO L78 Accepts]: Start accepts. Automaton has 1175 states and 4009 transitions. Word has length 25 [2021-07-09 18:12:29,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:29,372 INFO L482 AbstractCegarLoop]: Abstraction has 1175 states and 4009 transitions. [2021-07-09 18:12:29,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:29,372 INFO L276 IsEmpty]: Start isEmpty. Operand 1175 states and 4009 transitions. [2021-07-09 18:12:29,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:12:29,376 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:29,376 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:29,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-07-09 18:12:29,589 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:29,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:29,589 INFO L82 PathProgramCache]: Analyzing trace with hash 156506377, now seen corresponding path program 7 times [2021-07-09 18:12:29,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:29,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378451019] [2021-07-09 18:12:29,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:29,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:29,631 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:12:29,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:29,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378451019] [2021-07-09 18:12:29,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378451019] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:29,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669006301] [2021-07-09 18:12:29,632 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:29,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:29,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 18:12:29,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:29,751 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:29,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669006301] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:29,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:29,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2021-07-09 18:12:29,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682060611] [2021-07-09 18:12:29,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:12:29,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:29,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:12:29,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:12:29,753 INFO L87 Difference]: Start difference. First operand 1175 states and 4009 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:30,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:30,102 INFO L93 Difference]: Finished difference Result 4049 states and 12968 transitions. [2021-07-09 18:12:30,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:12:30,103 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:12:30,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:30,126 INFO L225 Difference]: With dead ends: 4049 [2021-07-09 18:12:30,126 INFO L226 Difference]: Without dead ends: 4037 [2021-07-09 18:12:30,127 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 123.1ms TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:12:30,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4037 states. [2021-07-09 18:12:30,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4037 to 1667. [2021-07-09 18:12:30,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1667 states, 1666 states have (on average 3.5834333733493398) internal successors, (5970), 1666 states have internal predecessors, (5970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:30,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1667 states to 1667 states and 5970 transitions. [2021-07-09 18:12:30,227 INFO L78 Accepts]: Start accepts. Automaton has 1667 states and 5970 transitions. Word has length 25 [2021-07-09 18:12:30,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:30,227 INFO L482 AbstractCegarLoop]: Abstraction has 1667 states and 5970 transitions. [2021-07-09 18:12:30,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:30,227 INFO L276 IsEmpty]: Start isEmpty. Operand 1667 states and 5970 transitions. [2021-07-09 18:12:30,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:12:30,232 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:30,232 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:30,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-09 18:12:30,455 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:30,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:30,456 INFO L82 PathProgramCache]: Analyzing trace with hash 2082329639, now seen corresponding path program 8 times [2021-07-09 18:12:30,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:30,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357480088] [2021-07-09 18:12:30,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:30,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:30,486 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:12:30,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:30,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357480088] [2021-07-09 18:12:30,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357480088] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:30,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356736938] [2021-07-09 18:12:30,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:30,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:12:30,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:30,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 18:12:30,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:30,590 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:30,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356736938] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:30,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:30,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-09 18:12:30,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881396599] [2021-07-09 18:12:30,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:12:30,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:30,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:12:30,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:12:30,592 INFO L87 Difference]: Start difference. First operand 1667 states and 5970 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:30,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:30,870 INFO L93 Difference]: Finished difference Result 4301 states and 14736 transitions. [2021-07-09 18:12:30,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:12:30,870 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:12:30,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:30,892 INFO L225 Difference]: With dead ends: 4301 [2021-07-09 18:12:30,892 INFO L226 Difference]: Without dead ends: 4283 [2021-07-09 18:12:30,893 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 115.4ms TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:12:30,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4283 states. [2021-07-09 18:12:30,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4283 to 2105. [2021-07-09 18:12:30,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2105 states, 2104 states have (on average 3.7243346007604563) internal successors, (7836), 2104 states have internal predecessors, (7836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:30,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2105 states to 2105 states and 7836 transitions. [2021-07-09 18:12:30,970 INFO L78 Accepts]: Start accepts. Automaton has 2105 states and 7836 transitions. Word has length 25 [2021-07-09 18:12:30,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:30,971 INFO L482 AbstractCegarLoop]: Abstraction has 2105 states and 7836 transitions. [2021-07-09 18:12:30,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:30,971 INFO L276 IsEmpty]: Start isEmpty. Operand 2105 states and 7836 transitions. [2021-07-09 18:12:30,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:12:30,977 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:30,977 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:31,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-07-09 18:12:31,194 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:31,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:31,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1027156865, now seen corresponding path program 9 times [2021-07-09 18:12:31,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:31,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181629978] [2021-07-09 18:12:31,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:31,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:31,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:31,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:31,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181629978] [2021-07-09 18:12:31,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181629978] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:31,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118729778] [2021-07-09 18:12:31,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:31,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:12:31,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:31,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 18:12:31,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:31,357 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:12:31,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118729778] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:31,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:31,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-07-09 18:12:31,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179858710] [2021-07-09 18:12:31,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:12:31,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:31,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:12:31,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:12:31,359 INFO L87 Difference]: Start difference. First operand 2105 states and 7836 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:31,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:31,940 INFO L93 Difference]: Finished difference Result 5231 states and 17596 transitions. [2021-07-09 18:12:31,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 18:12:31,940 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:12:31,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:31,955 INFO L225 Difference]: With dead ends: 5231 [2021-07-09 18:12:31,955 INFO L226 Difference]: Without dead ends: 5183 [2021-07-09 18:12:31,955 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 281.8ms TimeCoverageRelationStatistics Valid=312, Invalid=1020, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:12:31,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5183 states. [2021-07-09 18:12:32,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5183 to 2511. [2021-07-09 18:12:32,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2511 states, 2510 states have (on average 3.7788844621513946) internal successors, (9485), 2510 states have internal predecessors, (9485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:32,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2511 states to 2511 states and 9485 transitions. [2021-07-09 18:12:32,065 INFO L78 Accepts]: Start accepts. Automaton has 2511 states and 9485 transitions. Word has length 25 [2021-07-09 18:12:32,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:32,065 INFO L482 AbstractCegarLoop]: Abstraction has 2511 states and 9485 transitions. [2021-07-09 18:12:32,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:32,065 INFO L276 IsEmpty]: Start isEmpty. Operand 2511 states and 9485 transitions. [2021-07-09 18:12:32,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:12:32,072 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:32,073 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:32,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-09 18:12:32,289 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:32,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:32,289 INFO L82 PathProgramCache]: Analyzing trace with hash 2064619639, now seen corresponding path program 10 times [2021-07-09 18:12:32,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:32,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892901540] [2021-07-09 18:12:32,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:32,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:32,318 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:12:32,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:32,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892901540] [2021-07-09 18:12:32,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892901540] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:32,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265433786] [2021-07-09 18:12:32,319 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:32,351 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:12:32,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:32,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 18:12:32,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:32,395 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:12:32,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265433786] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:32,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:32,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-07-09 18:12:32,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761473774] [2021-07-09 18:12:32,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 18:12:32,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:32,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 18:12:32,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:12:32,397 INFO L87 Difference]: Start difference. First operand 2511 states and 9485 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:32,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:32,517 INFO L93 Difference]: Finished difference Result 4562 states and 16827 transitions. [2021-07-09 18:12:32,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:12:32,518 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:12:32,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:32,532 INFO L225 Difference]: With dead ends: 4562 [2021-07-09 18:12:32,533 INFO L226 Difference]: Without dead ends: 4178 [2021-07-09 18:12:32,533 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 34.8ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:12:32,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4178 states. [2021-07-09 18:12:32,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4178 to 3687. [2021-07-09 18:12:32,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3687 states, 3686 states have (on average 3.8027672273467172) internal successors, (14017), 3686 states have internal predecessors, (14017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:32,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3687 states to 3687 states and 14017 transitions. [2021-07-09 18:12:32,676 INFO L78 Accepts]: Start accepts. Automaton has 3687 states and 14017 transitions. Word has length 26 [2021-07-09 18:12:32,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:32,676 INFO L482 AbstractCegarLoop]: Abstraction has 3687 states and 14017 transitions. [2021-07-09 18:12:32,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:32,676 INFO L276 IsEmpty]: Start isEmpty. Operand 3687 states and 14017 transitions. [2021-07-09 18:12:32,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:12:32,688 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:32,688 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:32,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-09 18:12:32,913 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:32,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:32,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1428029849, now seen corresponding path program 11 times [2021-07-09 18:12:32,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:32,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844929863] [2021-07-09 18:12:32,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:32,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:32,953 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:32,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:32,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844929863] [2021-07-09 18:12:32,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844929863] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:32,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995701832] [2021-07-09 18:12:32,954 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:32,988 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:12:32,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:32,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:12:32,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:33,033 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:33,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995701832] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:33,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:33,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-07-09 18:12:33,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719631187] [2021-07-09 18:12:33,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 18:12:33,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:33,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 18:12:33,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:12:33,035 INFO L87 Difference]: Start difference. First operand 3687 states and 14017 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:33,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:33,194 INFO L93 Difference]: Finished difference Result 7909 states and 29810 transitions. [2021-07-09 18:12:33,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:12:33,195 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:12:33,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:33,225 INFO L225 Difference]: With dead ends: 7909 [2021-07-09 18:12:33,225 INFO L226 Difference]: Without dead ends: 7742 [2021-07-09 18:12:33,225 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 39.1ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:12:33,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7742 states. [2021-07-09 18:12:33,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7742 to 6781. [2021-07-09 18:12:33,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6781 states, 6780 states have (on average 3.888938053097345) internal successors, (26367), 6780 states have internal predecessors, (26367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:33,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6781 states to 6781 states and 26367 transitions. [2021-07-09 18:12:33,528 INFO L78 Accepts]: Start accepts. Automaton has 6781 states and 26367 transitions. Word has length 26 [2021-07-09 18:12:33,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:33,528 INFO L482 AbstractCegarLoop]: Abstraction has 6781 states and 26367 transitions. [2021-07-09 18:12:33,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:33,529 INFO L276 IsEmpty]: Start isEmpty. Operand 6781 states and 26367 transitions. [2021-07-09 18:12:33,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:12:33,544 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:33,544 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:33,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:33,750 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:33,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:33,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1734973483, now seen corresponding path program 12 times [2021-07-09 18:12:33,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:33,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403192925] [2021-07-09 18:12:33,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:33,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:33,836 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:12:33,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:33,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403192925] [2021-07-09 18:12:33,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403192925] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:33,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015431779] [2021-07-09 18:12:33,837 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:33,881 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:12:33,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:33,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 18:12:33,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:33,942 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:33,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015431779] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:33,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:33,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-07-09 18:12:33,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653268708] [2021-07-09 18:12:33,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:12:33,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:33,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:12:33,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:12:33,944 INFO L87 Difference]: Start difference. First operand 6781 states and 26367 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:34,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:34,529 INFO L93 Difference]: Finished difference Result 8978 states and 32104 transitions. [2021-07-09 18:12:34,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:12:34,529 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:12:34,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:34,561 INFO L225 Difference]: With dead ends: 8978 [2021-07-09 18:12:34,561 INFO L226 Difference]: Without dead ends: 8940 [2021-07-09 18:12:34,562 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 322.8ms TimeCoverageRelationStatistics Valid=372, Invalid=1110, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:12:34,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8940 states. [2021-07-09 18:12:34,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8940 to 6164. [2021-07-09 18:12:34,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6164 states, 6163 states have (on average 3.8249229271458707) internal successors, (23573), 6163 states have internal predecessors, (23573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:34,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6164 states to 6164 states and 23573 transitions. [2021-07-09 18:12:34,803 INFO L78 Accepts]: Start accepts. Automaton has 6164 states and 23573 transitions. Word has length 26 [2021-07-09 18:12:34,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:34,804 INFO L482 AbstractCegarLoop]: Abstraction has 6164 states and 23573 transitions. [2021-07-09 18:12:34,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:34,804 INFO L276 IsEmpty]: Start isEmpty. Operand 6164 states and 23573 transitions. [2021-07-09 18:12:34,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:12:34,817 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:34,817 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:35,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:35,017 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:35,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:35,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1999834593, now seen corresponding path program 13 times [2021-07-09 18:12:35,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:35,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842937080] [2021-07-09 18:12:35,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:35,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:35,048 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:12:35,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:35,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842937080] [2021-07-09 18:12:35,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842937080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:35,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603333358] [2021-07-09 18:12:35,049 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:35,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:35,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:12:35,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:35,154 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:12:35,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603333358] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:35,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:35,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-07-09 18:12:35,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121784607] [2021-07-09 18:12:35,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 18:12:35,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:35,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 18:12:35,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:12:35,157 INFO L87 Difference]: Start difference. First operand 6164 states and 23573 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:35,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:35,282 INFO L93 Difference]: Finished difference Result 9044 states and 33591 transitions. [2021-07-09 18:12:35,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:12:35,282 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:12:35,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:35,314 INFO L225 Difference]: With dead ends: 9044 [2021-07-09 18:12:35,314 INFO L226 Difference]: Without dead ends: 8684 [2021-07-09 18:12:35,315 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 51.5ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:12:35,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8684 states. [2021-07-09 18:12:35,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8684 to 7878. [2021-07-09 18:12:35,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7878 states, 7877 states have (on average 3.693665100926749) internal successors, (29095), 7877 states have internal predecessors, (29095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:35,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7878 states to 7878 states and 29095 transitions. [2021-07-09 18:12:35,616 INFO L78 Accepts]: Start accepts. Automaton has 7878 states and 29095 transitions. Word has length 28 [2021-07-09 18:12:35,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:35,616 INFO L482 AbstractCegarLoop]: Abstraction has 7878 states and 29095 transitions. [2021-07-09 18:12:35,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:35,617 INFO L276 IsEmpty]: Start isEmpty. Operand 7878 states and 29095 transitions. [2021-07-09 18:12:35,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:12:35,633 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:35,633 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:35,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-07-09 18:12:35,857 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:35,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:35,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1894101357, now seen corresponding path program 14 times [2021-07-09 18:12:35,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:35,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513410584] [2021-07-09 18:12:35,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:35,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:35,896 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:12:35,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:35,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513410584] [2021-07-09 18:12:35,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513410584] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:35,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960862206] [2021-07-09 18:12:35,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:35,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:12:35,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:35,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 18:12:35,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:35,992 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:12:35,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960862206] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:35,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:35,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-07-09 18:12:35,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212034746] [2021-07-09 18:12:35,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:12:35,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:35,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:12:35,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:12:35,994 INFO L87 Difference]: Start difference. First operand 7878 states and 29095 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:36,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:36,466 INFO L93 Difference]: Finished difference Result 13810 states and 49396 transitions. [2021-07-09 18:12:36,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:12:36,467 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:12:36,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:36,501 INFO L225 Difference]: With dead ends: 13810 [2021-07-09 18:12:36,501 INFO L226 Difference]: Without dead ends: 13666 [2021-07-09 18:12:36,502 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 200.0ms TimeCoverageRelationStatistics Valid=179, Invalid=471, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:12:36,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13666 states. [2021-07-09 18:12:36,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13666 to 12279. [2021-07-09 18:12:36,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12279 states, 12278 states have (on average 3.6391920508226097) internal successors, (44682), 12278 states have internal predecessors, (44682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:36,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12279 states to 12279 states and 44682 transitions. [2021-07-09 18:12:36,858 INFO L78 Accepts]: Start accepts. Automaton has 12279 states and 44682 transitions. Word has length 28 [2021-07-09 18:12:36,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:36,858 INFO L482 AbstractCegarLoop]: Abstraction has 12279 states and 44682 transitions. [2021-07-09 18:12:36,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:36,858 INFO L276 IsEmpty]: Start isEmpty. Operand 12279 states and 44682 transitions. [2021-07-09 18:12:36,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:12:36,886 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:36,886 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:37,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:37,110 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:37,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:37,110 INFO L82 PathProgramCache]: Analyzing trace with hash -162169889, now seen corresponding path program 15 times [2021-07-09 18:12:37,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:37,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013933459] [2021-07-09 18:12:37,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:37,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:37,492 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:37,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:37,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013933459] [2021-07-09 18:12:37,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013933459] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:37,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824962229] [2021-07-09 18:12:37,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:37,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:12:37,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:37,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-09 18:12:37,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:37,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-07-09 18:12:37,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:37,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:37,732 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:12:37,732 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:47 [2021-07-09 18:12:37,883 INFO L446 ElimStorePlain]: Different costs {1=[v_C_14], 2=[A, B]} [2021-07-09 18:12:37,903 INFO L354 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2021-07-09 18:12:37,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 29 [2021-07-09 18:12:37,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:37,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:37,944 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-07-09 18:12:37,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 30 [2021-07-09 18:12:37,947 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 18:12:37,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:37,981 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:37,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 37 [2021-07-09 18:12:38,017 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-09 18:12:38,038 INFO L628 ElimStorePlain]: treesize reduction 27, result has 53.4 percent of original size [2021-07-09 18:12:38,045 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:12:38,045 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:58, output treesize:31 [2021-07-09 18:12:38,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:38,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:12:38,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-07-09 18:12:38,310 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:38,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:38,319 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:12:38,319 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:5 [2021-07-09 18:12:38,342 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:38,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824962229] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:38,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:38,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:12:38,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224839803] [2021-07-09 18:12:38,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:12:38,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:38,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:12:38,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:12:38,344 INFO L87 Difference]: Start difference. First operand 12279 states and 44682 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:40,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:40,157 INFO L93 Difference]: Finished difference Result 19477 states and 69650 transitions. [2021-07-09 18:12:40,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:12:40,157 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:12:40,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:40,251 INFO L225 Difference]: With dead ends: 19477 [2021-07-09 18:12:40,251 INFO L226 Difference]: Without dead ends: 19400 [2021-07-09 18:12:40,252 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 1441.1ms TimeCoverageRelationStatistics Valid=231, Invalid=1329, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:12:40,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19400 states. [2021-07-09 18:12:40,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19400 to 12579. [2021-07-09 18:12:40,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12579 states, 12578 states have (on average 3.6326920019080937) internal successors, (45692), 12578 states have internal predecessors, (45692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:40,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12579 states to 12579 states and 45692 transitions. [2021-07-09 18:12:40,568 INFO L78 Accepts]: Start accepts. Automaton has 12579 states and 45692 transitions. Word has length 30 [2021-07-09 18:12:40,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:40,568 INFO L482 AbstractCegarLoop]: Abstraction has 12579 states and 45692 transitions. [2021-07-09 18:12:40,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:40,569 INFO L276 IsEmpty]: Start isEmpty. Operand 12579 states and 45692 transitions. [2021-07-09 18:12:40,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:12:40,595 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:40,595 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:40,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-09 18:12:40,809 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:40,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:40,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1021056265, now seen corresponding path program 16 times [2021-07-09 18:12:40,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:40,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250078112] [2021-07-09 18:12:40,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:40,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:41,285 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-07-09 18:12:41,402 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:41,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:41,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250078112] [2021-07-09 18:12:41,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250078112] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:41,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352176959] [2021-07-09 18:12:41,403 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:41,447 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:12:41,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:41,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:12:41,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:41,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-07-09 18:12:41,543 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:41,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:41,556 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:12:41,556 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:41 [2021-07-09 18:12:41,607 INFO L446 ElimStorePlain]: Different costs {1=[v_C_16], 5=[A, B]} [2021-07-09 18:12:41,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:41,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-07-09 18:12:41,623 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:41,636 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:41,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:41,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:12:41,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-07-09 18:12:41,642 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:41,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:41,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:41,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:12:41,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 23 [2021-07-09 18:12:41,654 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:41,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:41,660 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:12:41,660 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:54, output treesize:20 [2021-07-09 18:12:41,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:12:41,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:41,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:41,737 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:12:41,737 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:5 [2021-07-09 18:12:41,775 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:41,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352176959] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:41,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:41,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 17 [2021-07-09 18:12:41,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544717266] [2021-07-09 18:12:41,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:12:41,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:41,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:12:41,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:12:41,777 INFO L87 Difference]: Start difference. First operand 12579 states and 45692 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:42,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:42,780 INFO L93 Difference]: Finished difference Result 18700 states and 67364 transitions. [2021-07-09 18:12:42,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:12:42,781 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:12:42,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:42,834 INFO L225 Difference]: With dead ends: 18700 [2021-07-09 18:12:42,834 INFO L226 Difference]: Without dead ends: 18673 [2021-07-09 18:12:42,834 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 959.4ms TimeCoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:12:42,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18673 states. [2021-07-09 18:12:43,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18673 to 12554. [2021-07-09 18:12:43,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12554 states, 12553 states have (on average 3.630606229586553) internal successors, (45575), 12553 states have internal predecessors, (45575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:43,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12554 states to 12554 states and 45575 transitions. [2021-07-09 18:12:43,181 INFO L78 Accepts]: Start accepts. Automaton has 12554 states and 45575 transitions. Word has length 30 [2021-07-09 18:12:43,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:43,181 INFO L482 AbstractCegarLoop]: Abstraction has 12554 states and 45575 transitions. [2021-07-09 18:12:43,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:43,182 INFO L276 IsEmpty]: Start isEmpty. Operand 12554 states and 45575 transitions. [2021-07-09 18:12:43,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:12:43,203 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:43,204 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:43,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-07-09 18:12:43,404 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:43,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:43,405 INFO L82 PathProgramCache]: Analyzing trace with hash 86318325, now seen corresponding path program 17 times [2021-07-09 18:12:43,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:43,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605198359] [2021-07-09 18:12:43,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:43,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:43,715 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:43,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:43,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605198359] [2021-07-09 18:12:43,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605198359] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:43,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015865993] [2021-07-09 18:12:43,716 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:43,746 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:12:43,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:43,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 18:12:43,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:43,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-07-09 18:12:43,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:43,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:43,825 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:12:43,825 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:43 [2021-07-09 18:12:43,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-07-09 18:12:43,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:43,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:43,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2021-07-09 18:12:43,991 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:43,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:43,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2021-07-09 18:12:44,000 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:44,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:44,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:12:44,007 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:50, output treesize:18 [2021-07-09 18:12:44,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:12:44,044 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:44,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:44,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:12:44,046 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:5 [2021-07-09 18:12:44,065 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:44,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015865993] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:44,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:44,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-09 18:12:44,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662900687] [2021-07-09 18:12:44,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:12:44,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:44,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:12:44,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:12:44,066 INFO L87 Difference]: Start difference. First operand 12554 states and 45575 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:44,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:44,949 INFO L93 Difference]: Finished difference Result 18964 states and 68176 transitions. [2021-07-09 18:12:44,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:12:44,949 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:12:44,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:44,997 INFO L225 Difference]: With dead ends: 18964 [2021-07-09 18:12:44,997 INFO L226 Difference]: Without dead ends: 18829 [2021-07-09 18:12:44,997 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 685.1ms TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:12:45,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18829 states. [2021-07-09 18:12:45,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18829 to 12568. [2021-07-09 18:12:45,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12568 states, 12567 states have (on average 3.629983289567916) internal successors, (45618), 12567 states have internal predecessors, (45618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:45,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12568 states to 12568 states and 45618 transitions. [2021-07-09 18:12:45,285 INFO L78 Accepts]: Start accepts. Automaton has 12568 states and 45618 transitions. Word has length 30 [2021-07-09 18:12:45,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:45,285 INFO L482 AbstractCegarLoop]: Abstraction has 12568 states and 45618 transitions. [2021-07-09 18:12:45,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:45,285 INFO L276 IsEmpty]: Start isEmpty. Operand 12568 states and 45618 transitions. [2021-07-09 18:12:45,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:12:45,305 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:45,305 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:45,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-07-09 18:12:45,505 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:45,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:45,506 INFO L82 PathProgramCache]: Analyzing trace with hash -2058545279, now seen corresponding path program 18 times [2021-07-09 18:12:45,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:45,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377503691] [2021-07-09 18:12:45,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:45,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:45,759 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:45,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:45,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377503691] [2021-07-09 18:12:45,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377503691] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:45,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264014828] [2021-07-09 18:12:45,760 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:45,788 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 18:12:45,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:45,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:12:45,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:45,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-07-09 18:12:45,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:45,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:45,870 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:12:45,870 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-07-09 18:12:45,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:45,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2021-07-09 18:12:45,934 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:45,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:45,950 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:12:45,950 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:53, output treesize:58 [2021-07-09 18:12:45,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2021-07-09 18:12:45,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:46,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:46,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:12:46,007 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:29 [2021-07-09 18:12:46,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-07-09 18:12:46,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:46,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:46,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-09 18:12:46,052 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:46,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:46,054 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:12:46,054 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:34, output treesize:7 [2021-07-09 18:12:46,074 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:46,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264014828] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:46,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:46,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-07-09 18:12:46,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870622841] [2021-07-09 18:12:46,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:12:46,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:46,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:12:46,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:12:46,076 INFO L87 Difference]: Start difference. First operand 12568 states and 45618 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:46,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:46,815 INFO L93 Difference]: Finished difference Result 19016 states and 68403 transitions. [2021-07-09 18:12:46,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:12:46,815 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:12:46,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:46,861 INFO L225 Difference]: With dead ends: 19016 [2021-07-09 18:12:46,861 INFO L226 Difference]: Without dead ends: 18988 [2021-07-09 18:12:46,862 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 586.7ms TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:12:46,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18988 states. [2021-07-09 18:12:47,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18988 to 12589. [2021-07-09 18:12:47,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12589 states, 12588 states have (on average 3.6296472831267876) internal successors, (45690), 12588 states have internal predecessors, (45690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:47,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12589 states to 12589 states and 45690 transitions. [2021-07-09 18:12:47,222 INFO L78 Accepts]: Start accepts. Automaton has 12589 states and 45690 transitions. Word has length 30 [2021-07-09 18:12:47,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:47,222 INFO L482 AbstractCegarLoop]: Abstraction has 12589 states and 45690 transitions. [2021-07-09 18:12:47,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:47,223 INFO L276 IsEmpty]: Start isEmpty. Operand 12589 states and 45690 transitions. [2021-07-09 18:12:47,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:12:47,242 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:47,242 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:47,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-07-09 18:12:47,443 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:47,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:47,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1117626725, now seen corresponding path program 19 times [2021-07-09 18:12:47,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:47,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701452250] [2021-07-09 18:12:47,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:47,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:47,707 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:47,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:47,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701452250] [2021-07-09 18:12:47,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701452250] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:47,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389624534] [2021-07-09 18:12:47,708 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:47,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:47,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:12:47,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:47,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-07-09 18:12:47,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:47,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:47,806 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:12:47,806 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:46 [2021-07-09 18:12:47,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2021-07-09 18:12:47,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:47,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:47,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:12:47,892 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:48 [2021-07-09 18:12:47,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-07-09 18:12:47,939 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:47,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:47,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-07-09 18:12:47,951 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:47,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:47,958 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:12:47,958 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:49, output treesize:20 [2021-07-09 18:12:47,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:12:47,986 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:47,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:47,988 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:12:47,988 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:5 [2021-07-09 18:12:48,014 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:48,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389624534] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:48,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:48,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-07-09 18:12:48,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707690987] [2021-07-09 18:12:48,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:12:48,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:48,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:12:48,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:12:48,016 INFO L87 Difference]: Start difference. First operand 12589 states and 45690 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:48,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:48,801 INFO L93 Difference]: Finished difference Result 19083 states and 68572 transitions. [2021-07-09 18:12:48,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:12:48,801 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:12:48,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:48,858 INFO L225 Difference]: With dead ends: 19083 [2021-07-09 18:12:48,858 INFO L226 Difference]: Without dead ends: 18996 [2021-07-09 18:12:48,859 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 555.7ms TimeCoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:12:48,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18996 states. [2021-07-09 18:12:49,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18996 to 12601. [2021-07-09 18:12:49,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12601 states, 12600 states have (on average 3.628968253968254) internal successors, (45725), 12600 states have internal predecessors, (45725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:49,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12601 states to 12601 states and 45725 transitions. [2021-07-09 18:12:49,124 INFO L78 Accepts]: Start accepts. Automaton has 12601 states and 45725 transitions. Word has length 30 [2021-07-09 18:12:49,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:49,124 INFO L482 AbstractCegarLoop]: Abstraction has 12601 states and 45725 transitions. [2021-07-09 18:12:49,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:49,124 INFO L276 IsEmpty]: Start isEmpty. Operand 12601 states and 45725 transitions. [2021-07-09 18:12:49,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:12:49,142 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:49,142 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:49,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-07-09 18:12:49,342 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:49,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:49,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1872555743, now seen corresponding path program 20 times [2021-07-09 18:12:49,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:49,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744840181] [2021-07-09 18:12:49,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:49,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:49,621 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:49,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:49,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744840181] [2021-07-09 18:12:49,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744840181] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:49,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210129626] [2021-07-09 18:12:49,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:49,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:12:49,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:49,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 18:12:49,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:49,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-07-09 18:12:49,726 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:49,740 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:49,741 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:12:49,741 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:43 [2021-07-09 18:12:49,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-07-09 18:12:49,853 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:49,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:49,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-07-09 18:12:49,865 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:49,873 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:49,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-07-09 18:12:49,877 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:49,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:49,884 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:12:49,884 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:53, output treesize:21 [2021-07-09 18:12:50,029 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:50,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 30 [2021-07-09 18:12:50,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:12:50,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:50,059 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:12:50,059 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:53 [2021-07-09 18:12:50,113 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:50,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210129626] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:50,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:50,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 18:12:50,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307003584] [2021-07-09 18:12:50,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:12:50,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:50,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:12:50,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:12:50,115 INFO L87 Difference]: Start difference. First operand 12601 states and 45725 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:50,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:50,746 INFO L93 Difference]: Finished difference Result 19076 states and 68581 transitions. [2021-07-09 18:12:50,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:12:50,747 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:12:50,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:50,794 INFO L225 Difference]: With dead ends: 19076 [2021-07-09 18:12:50,794 INFO L226 Difference]: Without dead ends: 19013 [2021-07-09 18:12:50,795 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 508.8ms TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:12:50,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19013 states. [2021-07-09 18:12:51,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19013 to 12639. [2021-07-09 18:12:51,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12639 states, 12638 states have (on average 3.627868333597088) internal successors, (45849), 12638 states have internal predecessors, (45849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:51,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12639 states to 12639 states and 45849 transitions. [2021-07-09 18:12:51,068 INFO L78 Accepts]: Start accepts. Automaton has 12639 states and 45849 transitions. Word has length 30 [2021-07-09 18:12:51,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:51,068 INFO L482 AbstractCegarLoop]: Abstraction has 12639 states and 45849 transitions. [2021-07-09 18:12:51,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:51,068 INFO L276 IsEmpty]: Start isEmpty. Operand 12639 states and 45849 transitions. [2021-07-09 18:12:51,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:12:51,088 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:51,088 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:51,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:51,301 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:51,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:51,301 INFO L82 PathProgramCache]: Analyzing trace with hash -702398561, now seen corresponding path program 21 times [2021-07-09 18:12:51,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:51,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216470201] [2021-07-09 18:12:51,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:51,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:51,661 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:51,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:51,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216470201] [2021-07-09 18:12:51,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216470201] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:51,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626440818] [2021-07-09 18:12:51,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:51,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:12:51,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:51,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-09 18:12:51,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:51,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-07-09 18:12:51,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:51,772 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:51,772 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:12:51,772 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-07-09 18:12:51,967 INFO L446 ElimStorePlain]: Different costs {1=[v_C_26], 5=[A, B]} [2021-07-09 18:12:51,979 INFO L354 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2021-07-09 18:12:51,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2021-07-09 18:12:51,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:51,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:52,017 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-07-09 18:12:52,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 32 [2021-07-09 18:12:52,019 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 18:12:52,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:52,050 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:52,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 39 [2021-07-09 18:12:52,062 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-07-09 18:12:52,091 INFO L628 ElimStorePlain]: treesize reduction 28, result has 52.5 percent of original size [2021-07-09 18:12:52,096 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:12:52,096 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:56, output treesize:31 [2021-07-09 18:12:52,391 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1], 2=[C]} [2021-07-09 18:12:52,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-07-09 18:12:52,396 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:52,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:52,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:52,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:12:52,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:12:52,417 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:52,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:52,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:12:52,432 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:52, output treesize:20 [2021-07-09 18:12:52,489 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:52,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626440818] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:52,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:52,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-07-09 18:12:52,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876725958] [2021-07-09 18:12:52,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:12:52,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:52,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:12:52,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:12:52,490 INFO L87 Difference]: Start difference. First operand 12639 states and 45849 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:54,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:54,921 INFO L93 Difference]: Finished difference Result 19998 states and 71567 transitions. [2021-07-09 18:12:54,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:12:54,922 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:12:54,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:54,976 INFO L225 Difference]: With dead ends: 19998 [2021-07-09 18:12:54,976 INFO L226 Difference]: Without dead ends: 19967 [2021-07-09 18:12:54,977 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 1925.3ms TimeCoverageRelationStatistics Valid=299, Invalid=1771, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:12:54,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19967 states. [2021-07-09 18:12:55,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19967 to 12900. [2021-07-09 18:12:55,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12900 states, 12899 states have (on average 3.6274129777502133) internal successors, (46790), 12899 states have internal predecessors, (46790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:55,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12900 states to 12900 states and 46790 transitions. [2021-07-09 18:12:55,297 INFO L78 Accepts]: Start accepts. Automaton has 12900 states and 46790 transitions. Word has length 30 [2021-07-09 18:12:55,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:55,297 INFO L482 AbstractCegarLoop]: Abstraction has 12900 states and 46790 transitions. [2021-07-09 18:12:55,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:55,297 INFO L276 IsEmpty]: Start isEmpty. Operand 12900 states and 46790 transitions. [2021-07-09 18:12:55,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:12:55,320 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:55,320 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:55,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-07-09 18:12:55,537 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:55,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:55,537 INFO L82 PathProgramCache]: Analyzing trace with hash 867632129, now seen corresponding path program 22 times [2021-07-09 18:12:55,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:55,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691796451] [2021-07-09 18:12:55,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:55,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:55,890 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:55,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:55,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691796451] [2021-07-09 18:12:55,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691796451] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:55,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050970356] [2021-07-09 18:12:55,890 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:55,918 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:12:55,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:55,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:12:55,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:55,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-07-09 18:12:55,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:55,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:55,976 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:12:55,976 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-07-09 18:12:56,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:56,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-07-09 18:12:56,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:56,026 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:56,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:12:56,027 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:48 [2021-07-09 18:12:56,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-07-09 18:12:56,094 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:56,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:56,101 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:12:56,101 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:29 [2021-07-09 18:12:56,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-07-09 18:12:56,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:56,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:56,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-09 18:12:56,137 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:56,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:56,138 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:12:56,138 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:34, output treesize:5 [2021-07-09 18:12:56,157 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:56,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050970356] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:56,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:56,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-07-09 18:12:56,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905214208] [2021-07-09 18:12:56,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:12:56,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:56,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:12:56,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:12:56,159 INFO L87 Difference]: Start difference. First operand 12900 states and 46790 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:57,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:57,136 INFO L93 Difference]: Finished difference Result 17463 states and 62307 transitions. [2021-07-09 18:12:57,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:12:57,137 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:12:57,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:57,180 INFO L225 Difference]: With dead ends: 17463 [2021-07-09 18:12:57,180 INFO L226 Difference]: Without dead ends: 17424 [2021-07-09 18:12:57,181 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 706.7ms TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:12:57,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17424 states. [2021-07-09 18:12:57,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17424 to 12965. [2021-07-09 18:12:57,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12965 states, 12964 states have (on average 3.6258870718913916) internal successors, (47006), 12964 states have internal predecessors, (47006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:57,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12965 states to 12965 states and 47006 transitions. [2021-07-09 18:12:57,563 INFO L78 Accepts]: Start accepts. Automaton has 12965 states and 47006 transitions. Word has length 30 [2021-07-09 18:12:57,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:57,563 INFO L482 AbstractCegarLoop]: Abstraction has 12965 states and 47006 transitions. [2021-07-09 18:12:57,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:57,563 INFO L276 IsEmpty]: Start isEmpty. Operand 12965 states and 47006 transitions. [2021-07-09 18:12:57,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:12:57,580 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:57,580 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:57,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:57,781 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:57,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:57,781 INFO L82 PathProgramCache]: Analyzing trace with hash -251163163, now seen corresponding path program 23 times [2021-07-09 18:12:57,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:57,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370513950] [2021-07-09 18:12:57,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:57,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:58,121 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:58,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:58,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370513950] [2021-07-09 18:12:58,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370513950] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:58,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007893463] [2021-07-09 18:12:58,122 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:58,158 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:12:58,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:58,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-09 18:12:58,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:58,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-07-09 18:12:58,222 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:58,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:58,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:12:58,235 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:34 [2021-07-09 18:12:58,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-07-09 18:12:58,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:58,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:58,359 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:12:58,359 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:45 [2021-07-09 18:12:58,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-07-09 18:12:58,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:58,457 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:58,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-07-09 18:12:58,461 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:58,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:58,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:12:58,470 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:54, output treesize:25 [2021-07-09 18:12:58,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:58,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:58,524 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:58,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 39 [2021-07-09 18:12:58,531 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-07-09 18:12:58,548 INFO L628 ElimStorePlain]: treesize reduction 23, result has 48.9 percent of original size [2021-07-09 18:12:58,551 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:12:58,551 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:21 [2021-07-09 18:12:58,603 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:58,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007893463] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:58,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:58,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:12:58,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581937680] [2021-07-09 18:12:58,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:12:58,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:58,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:12:58,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:12:58,604 INFO L87 Difference]: Start difference. First operand 12965 states and 47006 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:00,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:00,272 INFO L93 Difference]: Finished difference Result 17500 states and 62338 transitions. [2021-07-09 18:13:00,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:13:00,273 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:13:00,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:00,316 INFO L225 Difference]: With dead ends: 17500 [2021-07-09 18:13:00,316 INFO L226 Difference]: Without dead ends: 17417 [2021-07-09 18:13:00,316 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 1225.3ms TimeCoverageRelationStatistics Valid=186, Invalid=1296, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:13:00,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17417 states. [2021-07-09 18:13:00,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17417 to 13000. [2021-07-09 18:13:00,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13000 states, 12999 states have (on average 3.624201861681668) internal successors, (47111), 12999 states have internal predecessors, (47111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:00,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13000 states to 13000 states and 47111 transitions. [2021-07-09 18:13:00,559 INFO L78 Accepts]: Start accepts. Automaton has 13000 states and 47111 transitions. Word has length 30 [2021-07-09 18:13:00,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:00,559 INFO L482 AbstractCegarLoop]: Abstraction has 13000 states and 47111 transitions. [2021-07-09 18:13:00,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:00,559 INFO L276 IsEmpty]: Start isEmpty. Operand 13000 states and 47111 transitions. [2021-07-09 18:13:00,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:13:00,579 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:00,579 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:00,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-07-09 18:13:00,785 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:00,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:00,785 INFO L82 PathProgramCache]: Analyzing trace with hash 2094092255, now seen corresponding path program 24 times [2021-07-09 18:13:00,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:00,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640409742] [2021-07-09 18:13:00,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:00,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:01,098 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:01,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:01,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640409742] [2021-07-09 18:13:01,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640409742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:01,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579828426] [2021-07-09 18:13:01,099 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:01,126 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:13:01,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:13:01,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 18:13:01,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:01,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-07-09 18:13:01,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:01,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:01,185 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:01,185 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:42 [2021-07-09 18:13:01,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:01,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-07-09 18:13:01,241 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:01,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:01,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:01,254 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:53 [2021-07-09 18:13:01,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:01,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:13:01,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-07-09 18:13:01,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:01,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:01,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:01,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:13:01,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 21 [2021-07-09 18:13:01,319 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:01,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:01,326 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:01,326 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:58, output treesize:25 [2021-07-09 18:13:01,388 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:01,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-07-09 18:13:01,391 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:13:01,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:01,413 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:01,413 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:55 [2021-07-09 18:13:01,492 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:01,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579828426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:01,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:01,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-09 18:13:01,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378804933] [2021-07-09 18:13:01,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:13:01,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:01,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:13:01,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:13:01,493 INFO L87 Difference]: Start difference. First operand 13000 states and 47111 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:02,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:02,485 INFO L93 Difference]: Finished difference Result 17447 states and 62196 transitions. [2021-07-09 18:13:02,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:13:02,485 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:13:02,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:02,527 INFO L225 Difference]: With dead ends: 17447 [2021-07-09 18:13:02,528 INFO L226 Difference]: Without dead ends: 17414 [2021-07-09 18:13:02,528 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 796.9ms TimeCoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:13:02,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17414 states. [2021-07-09 18:13:02,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17414 to 13030. [2021-07-09 18:13:02,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13030 states, 13029 states have (on average 3.62452989484995) internal successors, (47224), 13029 states have internal predecessors, (47224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:02,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13030 states to 13030 states and 47224 transitions. [2021-07-09 18:13:02,844 INFO L78 Accepts]: Start accepts. Automaton has 13030 states and 47224 transitions. Word has length 30 [2021-07-09 18:13:02,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:02,845 INFO L482 AbstractCegarLoop]: Abstraction has 13030 states and 47224 transitions. [2021-07-09 18:13:02,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:02,845 INFO L276 IsEmpty]: Start isEmpty. Operand 13030 states and 47224 transitions. [2021-07-09 18:13:02,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:13:02,863 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:02,863 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:03,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-07-09 18:13:03,072 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:03,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:03,073 INFO L82 PathProgramCache]: Analyzing trace with hash -2003600359, now seen corresponding path program 25 times [2021-07-09 18:13:03,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:03,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986272023] [2021-07-09 18:13:03,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:03,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:03,360 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:03,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:03,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986272023] [2021-07-09 18:13:03,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986272023] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:03,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066549775] [2021-07-09 18:13:03,360 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:03,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:03,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:13:03,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:03,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-07-09 18:13:03,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:03,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:03,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:03,480 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:56 [2021-07-09 18:13:03,581 INFO L446 ElimStorePlain]: Different costs {0=[A, B], 2=[v_C_34]} [2021-07-09 18:13:03,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-07-09 18:13:03,585 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:03,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:03,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2021-07-09 18:13:03,597 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:03,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:03,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:13:03,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2021-07-09 18:13:03,604 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:03,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:03,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:03,609 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:52, output treesize:24 [2021-07-09 18:13:03,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:13:03,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:03,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:03,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:03,641 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:5 [2021-07-09 18:13:03,657 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:03,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066549775] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:03,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:03,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-07-09 18:13:03,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560441444] [2021-07-09 18:13:03,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:13:03,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:03,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:13:03,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:13:03,659 INFO L87 Difference]: Start difference. First operand 13030 states and 47224 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:04,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:04,959 INFO L93 Difference]: Finished difference Result 19697 states and 70632 transitions. [2021-07-09 18:13:04,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:13:04,960 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:13:04,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:05,012 INFO L225 Difference]: With dead ends: 19697 [2021-07-09 18:13:05,012 INFO L226 Difference]: Without dead ends: 19634 [2021-07-09 18:13:05,013 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1017.1ms TimeCoverageRelationStatistics Valid=187, Invalid=869, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:13:05,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19634 states. [2021-07-09 18:13:05,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19634 to 13048. [2021-07-09 18:13:05,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13048 states, 13047 states have (on average 3.621368897064459) internal successors, (47248), 13047 states have internal predecessors, (47248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:05,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13048 states to 13048 states and 47248 transitions. [2021-07-09 18:13:05,279 INFO L78 Accepts]: Start accepts. Automaton has 13048 states and 47248 transitions. Word has length 30 [2021-07-09 18:13:05,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:05,279 INFO L482 AbstractCegarLoop]: Abstraction has 13048 states and 47248 transitions. [2021-07-09 18:13:05,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:05,279 INFO L276 IsEmpty]: Start isEmpty. Operand 13048 states and 47248 transitions. [2021-07-09 18:13:05,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:13:05,297 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:05,297 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:05,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-07-09 18:13:05,499 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:05,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:05,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1224465061, now seen corresponding path program 26 times [2021-07-09 18:13:05,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:05,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201674983] [2021-07-09 18:13:05,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:05,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:05,809 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:05,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:05,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201674983] [2021-07-09 18:13:05,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201674983] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:05,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897980023] [2021-07-09 18:13:05,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:05,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:13:05,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:13:05,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:13:05,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:05,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-07-09 18:13:05,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:05,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:05,916 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:05,916 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:42 [2021-07-09 18:13:06,005 INFO L446 ElimStorePlain]: Different costs {1=[v_C_36], 5=[A, B]} [2021-07-09 18:13:06,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:06,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-07-09 18:13:06,011 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:06,023 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:06,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:06,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:13:06,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-07-09 18:13:06,031 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:06,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:06,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:06,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:13:06,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 23 [2021-07-09 18:13:06,043 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:06,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:06,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:06,049 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:54, output treesize:20 [2021-07-09 18:13:06,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:13:06,111 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:06,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:06,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:06,113 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:5 [2021-07-09 18:13:06,132 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:06,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897980023] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:06,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:06,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-07-09 18:13:06,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499210078] [2021-07-09 18:13:06,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:13:06,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:06,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:13:06,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:13:06,134 INFO L87 Difference]: Start difference. First operand 13048 states and 47248 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:06,349 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2021-07-09 18:13:07,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:07,687 INFO L93 Difference]: Finished difference Result 20216 states and 72247 transitions. [2021-07-09 18:13:07,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:13:07,688 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:13:07,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:07,739 INFO L225 Difference]: With dead ends: 20216 [2021-07-09 18:13:07,739 INFO L226 Difference]: Without dead ends: 20179 [2021-07-09 18:13:07,740 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 1222.8ms TimeCoverageRelationStatistics Valid=214, Invalid=1046, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:13:07,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20179 states. [2021-07-09 18:13:07,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20179 to 13071. [2021-07-09 18:13:07,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13071 states, 13070 states have (on average 3.620734506503443) internal successors, (47323), 13070 states have internal predecessors, (47323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:08,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13071 states to 13071 states and 47323 transitions. [2021-07-09 18:13:08,019 INFO L78 Accepts]: Start accepts. Automaton has 13071 states and 47323 transitions. Word has length 30 [2021-07-09 18:13:08,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:08,019 INFO L482 AbstractCegarLoop]: Abstraction has 13071 states and 47323 transitions. [2021-07-09 18:13:08,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:08,020 INFO L276 IsEmpty]: Start isEmpty. Operand 13071 states and 47323 transitions. [2021-07-09 18:13:08,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:13:08,038 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:08,038 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:08,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:08,239 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:08,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:08,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1418556337, now seen corresponding path program 27 times [2021-07-09 18:13:08,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:08,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685681372] [2021-07-09 18:13:08,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:08,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:08,545 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:08,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:08,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685681372] [2021-07-09 18:13:08,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685681372] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:08,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817919279] [2021-07-09 18:13:08,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:08,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:13:08,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:13:08,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-09 18:13:08,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:08,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-07-09 18:13:08,626 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:08,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:08,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:08,638 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-07-09 18:13:08,886 INFO L446 ElimStorePlain]: Different costs {0=[v_C_38], 2=[A, B]} [2021-07-09 18:13:08,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2021-07-09 18:13:08,890 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:08,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:08,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:08,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:13:08,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-07-09 18:13:08,912 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:08,922 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:08,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:08,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:13:08,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-07-09 18:13:08,927 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:08,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:08,936 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:08,936 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:61, output treesize:24 [2021-07-09 18:13:09,020 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:09,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-07-09 18:13:09,032 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:13:09,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:09,064 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:09,064 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:56 [2021-07-09 18:13:09,125 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:09,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817919279] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:09,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:09,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-07-09 18:13:09,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760126490] [2021-07-09 18:13:09,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:13:09,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:09,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:13:09,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:13:09,127 INFO L87 Difference]: Start difference. First operand 13071 states and 47323 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:11,733 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-07-09 18:13:12,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:12,359 INFO L93 Difference]: Finished difference Result 20182 states and 72102 transitions. [2021-07-09 18:13:12,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:13:12,359 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:13:12,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:12,410 INFO L225 Difference]: With dead ends: 20182 [2021-07-09 18:13:12,410 INFO L226 Difference]: Without dead ends: 20063 [2021-07-09 18:13:12,411 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 2369.7ms TimeCoverageRelationStatistics Valid=292, Invalid=1870, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:13:12,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20063 states. [2021-07-09 18:13:12,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20063 to 13091. [2021-07-09 18:13:12,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13091 states, 13090 states have (on average 3.620550038197097) internal successors, (47393), 13090 states have internal predecessors, (47393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:12,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13091 states to 13091 states and 47393 transitions. [2021-07-09 18:13:12,688 INFO L78 Accepts]: Start accepts. Automaton has 13091 states and 47393 transitions. Word has length 30 [2021-07-09 18:13:12,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:12,688 INFO L482 AbstractCegarLoop]: Abstraction has 13091 states and 47393 transitions. [2021-07-09 18:13:12,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:12,688 INFO L276 IsEmpty]: Start isEmpty. Operand 13091 states and 47393 transitions. [2021-07-09 18:13:12,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:13:12,706 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:12,706 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:12,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-07-09 18:13:12,907 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:12,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:12,907 INFO L82 PathProgramCache]: Analyzing trace with hash -726307267, now seen corresponding path program 28 times [2021-07-09 18:13:12,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:12,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222895561] [2021-07-09 18:13:12,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:12,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:13,036 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:13,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:13,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222895561] [2021-07-09 18:13:13,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222895561] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:13,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347522845] [2021-07-09 18:13:13,037 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:13,066 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:13:13,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:13:13,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:13:13,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:13,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-07-09 18:13:13,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:13,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:13,115 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:13,115 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-07-09 18:13:13,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:13,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 39 [2021-07-09 18:13:13,192 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:13,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:13,205 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:13,205 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:69, output treesize:73 [2021-07-09 18:13:13,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:13,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 40 [2021-07-09 18:13:13,248 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:13,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:13,255 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:13,255 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:73, output treesize:48 [2021-07-09 18:13:13,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-07-09 18:13:13,291 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:13,295 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:13,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-07-09 18:13:13,297 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:13,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:13,299 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:13,299 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:34, output treesize:5 [2021-07-09 18:13:13,316 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:13,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347522845] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:13,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:13,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-09 18:13:13,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281049386] [2021-07-09 18:13:13,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:13:13,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:13,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:13:13,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:13:13,317 INFO L87 Difference]: Start difference. First operand 13091 states and 47393 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:13,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:13,657 INFO L93 Difference]: Finished difference Result 13664 states and 49172 transitions. [2021-07-09 18:13:13,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:13:13,658 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:13:13,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:13,693 INFO L225 Difference]: With dead ends: 13664 [2021-07-09 18:13:13,693 INFO L226 Difference]: Without dead ends: 13609 [2021-07-09 18:13:13,693 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 226.0ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:13:13,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13609 states. [2021-07-09 18:13:13,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13609 to 13109. [2021-07-09 18:13:13,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13109 states, 13108 states have (on average 3.6195453158376565) internal successors, (47445), 13108 states have internal predecessors, (47445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:13,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13109 states to 13109 states and 47445 transitions. [2021-07-09 18:13:13,928 INFO L78 Accepts]: Start accepts. Automaton has 13109 states and 47445 transitions. Word has length 30 [2021-07-09 18:13:13,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:13,929 INFO L482 AbstractCegarLoop]: Abstraction has 13109 states and 47445 transitions. [2021-07-09 18:13:13,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:13,929 INFO L276 IsEmpty]: Start isEmpty. Operand 13109 states and 47445 transitions. [2021-07-09 18:13:13,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:13:13,947 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:13,947 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:14,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:14,148 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:14,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:14,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1845102559, now seen corresponding path program 29 times [2021-07-09 18:13:14,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:14,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194348902] [2021-07-09 18:13:14,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:14,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:14,295 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:14,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:14,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194348902] [2021-07-09 18:13:14,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194348902] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:14,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129905780] [2021-07-09 18:13:14,295 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:14,324 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:13:14,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:13:14,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-09 18:13:14,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:14,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-07-09 18:13:14,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:14,369 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:14,369 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:14,370 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:41 [2021-07-09 18:13:14,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:14,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 39 [2021-07-09 18:13:14,521 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:14,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:14,536 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:14,536 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:72, output treesize:70 [2021-07-09 18:13:14,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:14,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2021-07-09 18:13:14,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:14,594 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:14,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:14,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2021-07-09 18:13:14,600 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:14,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:14,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:14,609 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:73, output treesize:29 [2021-07-09 18:13:14,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:13:14,643 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:14,648 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:14,649 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:14,649 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:12 [2021-07-09 18:13:14,694 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:14,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129905780] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:14,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:14,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-07-09 18:13:14,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713523687] [2021-07-09 18:13:14,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:13:14,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:14,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:13:14,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:13:14,696 INFO L87 Difference]: Start difference. First operand 13109 states and 47445 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:15,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:15,188 INFO L93 Difference]: Finished difference Result 13861 states and 49685 transitions. [2021-07-09 18:13:15,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:13:15,189 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:13:15,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:15,218 INFO L225 Difference]: With dead ends: 13861 [2021-07-09 18:13:15,219 INFO L226 Difference]: Without dead ends: 13687 [2021-07-09 18:13:15,219 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 378.7ms TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:13:15,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13687 states. [2021-07-09 18:13:15,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13687 to 13097. [2021-07-09 18:13:15,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13097 states, 13096 states have (on average 3.620494807574832) internal successors, (47414), 13096 states have internal predecessors, (47414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:15,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13097 states to 13097 states and 47414 transitions. [2021-07-09 18:13:15,430 INFO L78 Accepts]: Start accepts. Automaton has 13097 states and 47414 transitions. Word has length 30 [2021-07-09 18:13:15,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:15,431 INFO L482 AbstractCegarLoop]: Abstraction has 13097 states and 47414 transitions. [2021-07-09 18:13:15,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:15,431 INFO L276 IsEmpty]: Start isEmpty. Operand 13097 states and 47414 transitions. [2021-07-09 18:13:15,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:13:15,451 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:15,451 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:15,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:15,652 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:15,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:15,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1071325629, now seen corresponding path program 30 times [2021-07-09 18:13:15,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:15,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70547698] [2021-07-09 18:13:15,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:15,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:15,783 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:15,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:15,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70547698] [2021-07-09 18:13:15,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70547698] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:15,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138493184] [2021-07-09 18:13:15,784 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:15,821 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:13:15,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:13:15,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:13:15,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:15,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-07-09 18:13:15,863 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:15,875 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:15,876 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:15,876 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-07-09 18:13:15,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:15,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 39 [2021-07-09 18:13:15,945 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:15,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:15,960 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:15,960 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:53, output treesize:51 [2021-07-09 18:13:16,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:16,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2021-07-09 18:13:16,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:16,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:16,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:16,014 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:30 [2021-07-09 18:13:16,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-07-09 18:13:16,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:16,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:16,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-07-09 18:13:16,090 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:16,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:16,092 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:16,092 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:34, output treesize:7 [2021-07-09 18:13:16,112 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:16,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138493184] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:16,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:16,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-09 18:13:16,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830776511] [2021-07-09 18:13:16,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:13:16,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:16,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:13:16,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:13:16,117 INFO L87 Difference]: Start difference. First operand 13097 states and 47414 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:16,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:16,409 INFO L93 Difference]: Finished difference Result 14060 states and 50461 transitions. [2021-07-09 18:13:16,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:13:16,410 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:13:16,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:16,442 INFO L225 Difference]: With dead ends: 14060 [2021-07-09 18:13:16,443 INFO L226 Difference]: Without dead ends: 14032 [2021-07-09 18:13:16,443 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 246.0ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:13:16,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14032 states. [2021-07-09 18:13:16,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14032 to 13135. [2021-07-09 18:13:16,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13135 states, 13134 states have (on average 3.6185472818638647) internal successors, (47526), 13134 states have internal predecessors, (47526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:16,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13135 states to 13135 states and 47526 transitions. [2021-07-09 18:13:16,739 INFO L78 Accepts]: Start accepts. Automaton has 13135 states and 47526 transitions. Word has length 30 [2021-07-09 18:13:16,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:16,739 INFO L482 AbstractCegarLoop]: Abstraction has 13135 states and 47526 transitions. [2021-07-09 18:13:16,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:16,739 INFO L276 IsEmpty]: Start isEmpty. Operand 13135 states and 47526 transitions. [2021-07-09 18:13:16,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:13:16,757 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:16,757 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:16,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-07-09 18:13:16,959 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:16,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:16,960 INFO L82 PathProgramCache]: Analyzing trace with hash -349125983, now seen corresponding path program 31 times [2021-07-09 18:13:16,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:16,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945834398] [2021-07-09 18:13:16,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:16,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:17,064 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:17,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:17,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945834398] [2021-07-09 18:13:17,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945834398] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:17,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162900344] [2021-07-09 18:13:17,065 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:17,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:17,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:13:17,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:17,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-07-09 18:13:17,145 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:17,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:17,157 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:17,157 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-07-09 18:13:17,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:17,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 39 [2021-07-09 18:13:17,218 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:17,229 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:17,232 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:17,232 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:53, output treesize:51 [2021-07-09 18:13:17,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:17,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-07-09 18:13:17,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:17,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:17,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:17,303 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:48 [2021-07-09 18:13:17,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-07-09 18:13:17,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:17,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:17,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-07-09 18:13:17,352 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:17,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:17,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:17,354 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:34, output treesize:7 [2021-07-09 18:13:17,375 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:17,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162900344] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:17,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:17,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-09 18:13:17,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625961720] [2021-07-09 18:13:17,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:13:17,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:17,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:13:17,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:13:17,377 INFO L87 Difference]: Start difference. First operand 13135 states and 47526 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:17,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:17,745 INFO L93 Difference]: Finished difference Result 13946 states and 50119 transitions. [2021-07-09 18:13:17,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:13:17,746 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:13:17,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:17,779 INFO L225 Difference]: With dead ends: 13946 [2021-07-09 18:13:17,779 INFO L226 Difference]: Without dead ends: 13912 [2021-07-09 18:13:17,779 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 226.4ms TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:13:17,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13912 states. [2021-07-09 18:13:17,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13912 to 13160. [2021-07-09 18:13:17,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13160 states, 13159 states have (on average 3.617828102439395) internal successors, (47607), 13159 states have internal predecessors, (47607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:18,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13160 states to 13160 states and 47607 transitions. [2021-07-09 18:13:18,003 INFO L78 Accepts]: Start accepts. Automaton has 13160 states and 47607 transitions. Word has length 30 [2021-07-09 18:13:18,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:18,003 INFO L482 AbstractCegarLoop]: Abstraction has 13160 states and 47607 transitions. [2021-07-09 18:13:18,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:18,003 INFO L276 IsEmpty]: Start isEmpty. Operand 13160 states and 47607 transitions. [2021-07-09 18:13:18,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:13:18,022 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:18,022 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:18,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:18,223 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:18,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:18,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1368944027, now seen corresponding path program 32 times [2021-07-09 18:13:18,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:18,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794080018] [2021-07-09 18:13:18,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:18,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:18,348 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:18,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:18,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794080018] [2021-07-09 18:13:18,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794080018] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:18,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859876627] [2021-07-09 18:13:18,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:18,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:13:18,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:13:18,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:13:18,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:18,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-07-09 18:13:18,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:18,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:18,436 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:18,436 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:38 [2021-07-09 18:13:18,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:18,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 39 [2021-07-09 18:13:18,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:18,518 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:18,519 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:18,519 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:53, output treesize:54 [2021-07-09 18:13:18,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-07-09 18:13:18,608 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:18,615 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:18,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-07-09 18:13:18,619 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:18,625 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:18,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:18,626 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:24 [2021-07-09 18:13:18,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:13:18,654 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:18,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:18,656 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:18,656 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:5 [2021-07-09 18:13:18,687 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:18,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859876627] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:18,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:18,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-09 18:13:18,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845223853] [2021-07-09 18:13:18,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:13:18,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:18,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:13:18,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:13:18,689 INFO L87 Difference]: Start difference. First operand 13160 states and 47607 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:19,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:19,022 INFO L93 Difference]: Finished difference Result 14147 states and 50700 transitions. [2021-07-09 18:13:19,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:13:19,022 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:13:19,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:19,055 INFO L225 Difference]: With dead ends: 14147 [2021-07-09 18:13:19,055 INFO L226 Difference]: Without dead ends: 14098 [2021-07-09 18:13:19,055 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 260.0ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:13:19,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14098 states. [2021-07-09 18:13:19,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14098 to 13164. [2021-07-09 18:13:19,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13164 states, 13163 states have (on average 3.618400060776419) internal successors, (47629), 13163 states have internal predecessors, (47629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:19,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13164 states to 13164 states and 47629 transitions. [2021-07-09 18:13:19,279 INFO L78 Accepts]: Start accepts. Automaton has 13164 states and 47629 transitions. Word has length 30 [2021-07-09 18:13:19,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:19,279 INFO L482 AbstractCegarLoop]: Abstraction has 13164 states and 47629 transitions. [2021-07-09 18:13:19,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:19,279 INFO L276 IsEmpty]: Start isEmpty. Operand 13164 states and 47629 transitions. [2021-07-09 18:13:19,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:13:19,298 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:19,298 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:19,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-07-09 18:13:19,499 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:19,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:19,499 INFO L82 PathProgramCache]: Analyzing trace with hash 5796635, now seen corresponding path program 33 times [2021-07-09 18:13:19,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:19,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621743219] [2021-07-09 18:13:19,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:19,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:19,801 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:19,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:19,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621743219] [2021-07-09 18:13:19,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621743219] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:19,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781924859] [2021-07-09 18:13:19,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:19,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:13:19,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:13:19,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:13:19,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:19,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-07-09 18:13:19,875 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:19,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:19,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:19,886 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:38 [2021-07-09 18:13:20,104 INFO L446 ElimStorePlain]: Different costs {0=[v_C_50], 2=[A, B]} [2021-07-09 18:13:20,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2021-07-09 18:13:20,109 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:20,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:20,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:20,143 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:20,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 32 [2021-07-09 18:13:20,145 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 18:13:20,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:20,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:20,175 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:20,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2021-07-09 18:13:20,179 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:13:20,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:20,198 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:20,198 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:64, output treesize:33 [2021-07-09 18:13:20,347 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:20,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-07-09 18:13:20,351 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:13:20,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:20,379 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:20,379 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:56 [2021-07-09 18:13:20,450 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:20,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781924859] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:20,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:20,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-07-09 18:13:20,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651419341] [2021-07-09 18:13:20,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:13:20,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:20,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:13:20,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:13:20,451 INFO L87 Difference]: Start difference. First operand 13164 states and 47629 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:23,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:23,033 INFO L93 Difference]: Finished difference Result 20521 states and 73160 transitions. [2021-07-09 18:13:23,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:13:23,034 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:13:23,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:23,092 INFO L225 Difference]: With dead ends: 20521 [2021-07-09 18:13:23,092 INFO L226 Difference]: Without dead ends: 20328 [2021-07-09 18:13:23,093 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 2080.1ms TimeCoverageRelationStatistics Valid=362, Invalid=2608, Unknown=0, NotChecked=0, Total=2970 [2021-07-09 18:13:23,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20328 states. [2021-07-09 18:13:23,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20328 to 13204. [2021-07-09 18:13:23,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13204 states, 13203 states have (on average 3.6177383927895175) internal successors, (47765), 13203 states have internal predecessors, (47765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:23,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13204 states to 13204 states and 47765 transitions. [2021-07-09 18:13:23,367 INFO L78 Accepts]: Start accepts. Automaton has 13204 states and 47765 transitions. Word has length 30 [2021-07-09 18:13:23,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:23,367 INFO L482 AbstractCegarLoop]: Abstraction has 13204 states and 47765 transitions. [2021-07-09 18:13:23,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:23,367 INFO L276 IsEmpty]: Start isEmpty. Operand 13204 states and 47765 transitions. [2021-07-09 18:13:23,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:13:23,385 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:23,385 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:23,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:23,586 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:23,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:23,586 INFO L82 PathProgramCache]: Analyzing trace with hash -2139066969, now seen corresponding path program 34 times [2021-07-09 18:13:23,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:23,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666237276] [2021-07-09 18:13:23,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:23,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:23,857 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:23,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:23,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666237276] [2021-07-09 18:13:23,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666237276] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:23,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556193738] [2021-07-09 18:13:23,857 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:23,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:13:23,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:13:23,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:13:23,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:23,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-07-09 18:13:23,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:23,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:23,927 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:23,927 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-07-09 18:13:24,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2021-07-09 18:13:24,002 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:24,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:24,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:24,014 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:48 [2021-07-09 18:13:24,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2021-07-09 18:13:24,050 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:24,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:24,057 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:24,057 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:29 [2021-07-09 18:13:24,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-07-09 18:13:24,087 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:24,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:24,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-09 18:13:24,092 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:24,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:24,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:24,094 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:34, output treesize:5 [2021-07-09 18:13:24,113 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:24,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556193738] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:24,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:24,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-07-09 18:13:24,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660295864] [2021-07-09 18:13:24,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:13:24,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:24,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:13:24,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:13:24,115 INFO L87 Difference]: Start difference. First operand 13204 states and 47765 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:25,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:25,323 INFO L93 Difference]: Finished difference Result 21063 states and 75027 transitions. [2021-07-09 18:13:25,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:13:25,323 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:13:25,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:25,375 INFO L225 Difference]: With dead ends: 21063 [2021-07-09 18:13:25,375 INFO L226 Difference]: Without dead ends: 21002 [2021-07-09 18:13:25,376 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 982.4ms TimeCoverageRelationStatistics Valid=229, Invalid=1103, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:13:25,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21002 states. [2021-07-09 18:13:25,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21002 to 13250. [2021-07-09 18:13:25,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13250 states, 13249 states have (on average 3.6160464940750243) internal successors, (47909), 13249 states have internal predecessors, (47909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:25,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13250 states to 13250 states and 47909 transitions. [2021-07-09 18:13:25,650 INFO L78 Accepts]: Start accepts. Automaton has 13250 states and 47909 transitions. Word has length 30 [2021-07-09 18:13:25,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:25,650 INFO L482 AbstractCegarLoop]: Abstraction has 13250 states and 47909 transitions. [2021-07-09 18:13:25,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:25,650 INFO L276 IsEmpty]: Start isEmpty. Operand 13250 states and 47909 transitions. [2021-07-09 18:13:25,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:13:25,668 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:25,668 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:25,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-07-09 18:13:25,869 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:25,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:25,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1037105035, now seen corresponding path program 35 times [2021-07-09 18:13:25,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:25,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195660229] [2021-07-09 18:13:25,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:25,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:26,217 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:26,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:26,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195660229] [2021-07-09 18:13:26,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195660229] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:26,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702841626] [2021-07-09 18:13:26,221 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:26,248 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:13:26,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:13:26,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-09 18:13:26,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:26,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-07-09 18:13:26,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:26,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:26,300 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:26,301 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:35 [2021-07-09 18:13:26,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:26,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 39 [2021-07-09 18:13:26,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:26,476 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:26,477 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:26,477 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:72, output treesize:76 [2021-07-09 18:13:26,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:26,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 43 [2021-07-09 18:13:26,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:26,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:26,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:26,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-07-09 18:13:26,552 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:26,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:26,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:26,561 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:79, output treesize:35 [2021-07-09 18:13:26,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:13:26,596 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:26,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:26,602 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:26,602 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:12 [2021-07-09 18:13:26,656 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:26,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702841626] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:26,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:26,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:13:26,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547813377] [2021-07-09 18:13:26,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:13:26,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:26,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:13:26,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:13:26,658 INFO L87 Difference]: Start difference. First operand 13250 states and 47909 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:28,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:28,000 INFO L93 Difference]: Finished difference Result 20851 states and 74309 transitions. [2021-07-09 18:13:28,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:13:28,001 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:13:28,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:28,052 INFO L225 Difference]: With dead ends: 20851 [2021-07-09 18:13:28,052 INFO L226 Difference]: Without dead ends: 20683 [2021-07-09 18:13:28,053 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 1197.6ms TimeCoverageRelationStatistics Valid=288, Invalid=1194, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:13:28,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20683 states. [2021-07-09 18:13:28,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20683 to 13238. [2021-07-09 18:13:28,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13238 states, 13237 states have (on average 3.616529425096321) internal successors, (47872), 13237 states have internal predecessors, (47872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:28,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13238 states to 13238 states and 47872 transitions. [2021-07-09 18:13:28,331 INFO L78 Accepts]: Start accepts. Automaton has 13238 states and 47872 transitions. Word has length 30 [2021-07-09 18:13:28,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:28,332 INFO L482 AbstractCegarLoop]: Abstraction has 13238 states and 47872 transitions. [2021-07-09 18:13:28,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:28,332 INFO L276 IsEmpty]: Start isEmpty. Operand 13238 states and 47872 transitions. [2021-07-09 18:13:28,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:13:28,351 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:28,351 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:28,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-07-09 18:13:28,552 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:28,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:28,552 INFO L82 PathProgramCache]: Analyzing trace with hash -354822415, now seen corresponding path program 36 times [2021-07-09 18:13:28,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:28,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564433854] [2021-07-09 18:13:28,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:28,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:28,816 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:28,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:28,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564433854] [2021-07-09 18:13:28,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564433854] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:28,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655842662] [2021-07-09 18:13:28,817 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:28,844 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:13:28,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:13:28,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 18:13:28,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:28,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-07-09 18:13:28,889 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:28,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:28,900 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:28,900 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:38 [2021-07-09 18:13:29,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2021-07-09 18:13:29,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:29,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:29,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-07-09 18:13:29,095 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:29,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:29,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-07-09 18:13:29,110 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:29,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:29,119 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:29,119 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:53, output treesize:23 [2021-07-09 18:13:29,176 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:29,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-07-09 18:13:29,182 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:13:29,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:29,207 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:29,207 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:53 [2021-07-09 18:13:29,269 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:29,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655842662] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:29,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:29,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-09 18:13:29,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674301843] [2021-07-09 18:13:29,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:13:29,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:29,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:13:29,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:13:29,271 INFO L87 Difference]: Start difference. First operand 13238 states and 47872 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:30,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:30,590 INFO L93 Difference]: Finished difference Result 20970 states and 74635 transitions. [2021-07-09 18:13:30,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:13:30,591 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:13:30,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:30,656 INFO L225 Difference]: With dead ends: 20970 [2021-07-09 18:13:30,657 INFO L226 Difference]: Without dead ends: 20815 [2021-07-09 18:13:30,657 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1133.3ms TimeCoverageRelationStatistics Valid=235, Invalid=955, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:13:30,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20815 states. [2021-07-09 18:13:30,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20815 to 13250. [2021-07-09 18:13:31,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13250 states, 13249 states have (on average 3.616574835836667) internal successors, (47916), 13249 states have internal predecessors, (47916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:31,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13250 states to 13250 states and 47916 transitions. [2021-07-09 18:13:31,051 INFO L78 Accepts]: Start accepts. Automaton has 13250 states and 47916 transitions. Word has length 30 [2021-07-09 18:13:31,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:31,051 INFO L482 AbstractCegarLoop]: Abstraction has 13250 states and 47916 transitions. [2021-07-09 18:13:31,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:31,052 INFO L276 IsEmpty]: Start isEmpty. Operand 13250 states and 47916 transitions. [2021-07-09 18:13:31,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:13:31,071 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:31,072 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:31,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:31,273 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:31,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:31,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1431415003, now seen corresponding path program 37 times [2021-07-09 18:13:31,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:31,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193906595] [2021-07-09 18:13:31,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:31,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:31,555 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:31,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:31,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193906595] [2021-07-09 18:13:31,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193906595] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:31,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329365813] [2021-07-09 18:13:31,556 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:31,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:31,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:13:31,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:31,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-07-09 18:13:31,621 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:31,631 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:31,631 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:31,631 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:38 [2021-07-09 18:13:31,764 INFO L446 ElimStorePlain]: Different costs {0=[A, B], 2=[v_C_58]} [2021-07-09 18:13:31,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-07-09 18:13:31,768 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:31,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:31,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2021-07-09 18:13:31,780 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:31,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:31,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:13:31,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2021-07-09 18:13:31,789 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:31,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:31,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:31,796 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:52, output treesize:24 [2021-07-09 18:13:31,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:13:31,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:31,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:31,839 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:31,839 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:5 [2021-07-09 18:13:31,859 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:31,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329365813] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:31,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:31,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-07-09 18:13:31,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991990336] [2021-07-09 18:13:31,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:13:31,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:31,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:13:31,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:13:31,861 INFO L87 Difference]: Start difference. First operand 13250 states and 47916 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:33,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:33,010 INFO L93 Difference]: Finished difference Result 20480 states and 73212 transitions. [2021-07-09 18:13:33,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:13:33,011 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:13:33,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:33,063 INFO L225 Difference]: With dead ends: 20480 [2021-07-09 18:13:33,063 INFO L226 Difference]: Without dead ends: 20403 [2021-07-09 18:13:33,064 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 911.3ms TimeCoverageRelationStatistics Valid=187, Invalid=869, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:13:33,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20403 states. [2021-07-09 18:13:33,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20403 to 13288. [2021-07-09 18:13:33,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13288 states, 13287 states have (on average 3.616467223602017) internal successors, (48052), 13287 states have internal predecessors, (48052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:33,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13288 states to 13288 states and 48052 transitions. [2021-07-09 18:13:33,353 INFO L78 Accepts]: Start accepts. Automaton has 13288 states and 48052 transitions. Word has length 30 [2021-07-09 18:13:33,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:33,353 INFO L482 AbstractCegarLoop]: Abstraction has 13288 states and 48052 transitions. [2021-07-09 18:13:33,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:33,353 INFO L276 IsEmpty]: Start isEmpty. Operand 13288 states and 48052 transitions. [2021-07-09 18:13:33,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:13:33,372 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:33,372 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:33,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:33,573 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:33,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:33,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1143539301, now seen corresponding path program 38 times [2021-07-09 18:13:33,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:33,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978280870] [2021-07-09 18:13:33,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:33,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:33,857 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:33,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:33,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978280870] [2021-07-09 18:13:33,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978280870] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:33,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497615182] [2021-07-09 18:13:33,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:33,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:13:33,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:13:33,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-09 18:13:33,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:33,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-07-09 18:13:33,927 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:33,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:33,937 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:33,937 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-07-09 18:13:34,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:34,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2021-07-09 18:13:34,061 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:34,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:34,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:34,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2021-07-09 18:13:34,072 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:34,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:34,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:34,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 21 [2021-07-09 18:13:34,080 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:34,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:34,087 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:34,087 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:65, output treesize:28 [2021-07-09 18:13:34,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:13:34,142 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:34,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:34,146 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:34,146 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:12 [2021-07-09 18:13:34,182 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:34,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497615182] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:34,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:34,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-09 18:13:34,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341421650] [2021-07-09 18:13:34,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:13:34,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:34,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:13:34,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:13:34,183 INFO L87 Difference]: Start difference. First operand 13288 states and 48052 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:34,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:34,863 INFO L93 Difference]: Finished difference Result 20209 states and 72427 transitions. [2021-07-09 18:13:34,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:13:34,864 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:13:34,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:34,913 INFO L225 Difference]: With dead ends: 20209 [2021-07-09 18:13:34,913 INFO L226 Difference]: Without dead ends: 20182 [2021-07-09 18:13:34,913 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 539.6ms TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:13:34,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20182 states. [2021-07-09 18:13:35,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20182 to 13360. [2021-07-09 18:13:35,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13360 states, 13359 states have (on average 3.616138932554832) internal successors, (48308), 13359 states have internal predecessors, (48308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:35,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13360 states to 13360 states and 48308 transitions. [2021-07-09 18:13:35,182 INFO L78 Accepts]: Start accepts. Automaton has 13360 states and 48308 transitions. Word has length 30 [2021-07-09 18:13:35,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:35,182 INFO L482 AbstractCegarLoop]: Abstraction has 13360 states and 48308 transitions. [2021-07-09 18:13:35,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:35,182 INFO L276 IsEmpty]: Start isEmpty. Operand 13360 states and 48308 transitions. [2021-07-09 18:13:35,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:13:35,201 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:35,201 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:35,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:35,403 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:35,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:35,403 INFO L82 PathProgramCache]: Analyzing trace with hash 426491389, now seen corresponding path program 39 times [2021-07-09 18:13:35,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:35,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769883129] [2021-07-09 18:13:35,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:35,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:35,701 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:35,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:35,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769883129] [2021-07-09 18:13:35,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769883129] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:35,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020098640] [2021-07-09 18:13:35,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:35,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:13:35,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:13:35,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 18:13:35,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:35,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-07-09 18:13:35,784 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:35,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:35,796 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:35,796 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-07-09 18:13:35,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:35,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-07-09 18:13:35,867 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:35,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:35,884 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:35,885 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:70, output treesize:69 [2021-07-09 18:13:36,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:36,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:13:36,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-07-09 18:13:36,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:36,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:36,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:36,083 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:76, output treesize:48 [2021-07-09 18:13:36,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-07-09 18:13:36,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:36,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:36,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-07-09 18:13:36,132 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:36,134 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:36,134 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:36,134 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:34, output treesize:7 [2021-07-09 18:13:36,158 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:36,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020098640] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:36,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:36,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-07-09 18:13:36,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600874824] [2021-07-09 18:13:36,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:13:36,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:36,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:13:36,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:13:36,159 INFO L87 Difference]: Start difference. First operand 13360 states and 48308 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:36,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:36,839 INFO L93 Difference]: Finished difference Result 14509 states and 51925 transitions. [2021-07-09 18:13:36,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:13:36,839 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:13:36,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:36,873 INFO L225 Difference]: With dead ends: 14509 [2021-07-09 18:13:36,873 INFO L226 Difference]: Without dead ends: 14476 [2021-07-09 18:13:36,874 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 528.6ms TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:13:36,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14476 states. [2021-07-09 18:13:37,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14476 to 13399. [2021-07-09 18:13:37,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13399 states, 13398 states have (on average 3.6151664427526495) internal successors, (48436), 13398 states have internal predecessors, (48436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:37,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13399 states to 13399 states and 48436 transitions. [2021-07-09 18:13:37,099 INFO L78 Accepts]: Start accepts. Automaton has 13399 states and 48436 transitions. Word has length 30 [2021-07-09 18:13:37,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:37,099 INFO L482 AbstractCegarLoop]: Abstraction has 13399 states and 48436 transitions. [2021-07-09 18:13:37,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:37,100 INFO L276 IsEmpty]: Start isEmpty. Operand 13399 states and 48436 transitions. [2021-07-09 18:13:37,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:13:37,118 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:37,118 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:37,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:37,319 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:37,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:37,319 INFO L82 PathProgramCache]: Analyzing trace with hash -692303903, now seen corresponding path program 40 times [2021-07-09 18:13:37,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:37,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768944073] [2021-07-09 18:13:37,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:37,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:37,505 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:37,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:37,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768944073] [2021-07-09 18:13:37,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768944073] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:37,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056329572] [2021-07-09 18:13:37,505 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:37,532 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:13:37,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:13:37,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:13:37,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:37,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-07-09 18:13:37,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:37,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:37,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:37,575 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-07-09 18:13:37,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:37,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-07-09 18:13:37,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:37,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:37,656 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:37,656 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:54 [2021-07-09 18:13:37,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:37,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 65 [2021-07-09 18:13:37,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:37,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:37,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:37,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 52 [2021-07-09 18:13:37,767 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:37,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:37,774 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:37,774 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:158, output treesize:57 [2021-07-09 18:13:37,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:13:37,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:37,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:37,807 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:37,807 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:5 [2021-07-09 18:13:37,834 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:37,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056329572] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:37,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:37,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-07-09 18:13:37,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396856871] [2021-07-09 18:13:37,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:13:37,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:37,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:13:37,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:13:37,836 INFO L87 Difference]: Start difference. First operand 13399 states and 48436 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:38,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:38,222 INFO L93 Difference]: Finished difference Result 14052 states and 50450 transitions. [2021-07-09 18:13:38,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:13:38,223 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:13:38,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:38,255 INFO L225 Difference]: With dead ends: 14052 [2021-07-09 18:13:38,256 INFO L226 Difference]: Without dead ends: 13977 [2021-07-09 18:13:38,256 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 360.4ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:13:38,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13977 states. [2021-07-09 18:13:38,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13977 to 13399. [2021-07-09 18:13:38,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13399 states, 13398 states have (on average 3.615091804746977) internal successors, (48435), 13398 states have internal predecessors, (48435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:38,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13399 states to 13399 states and 48435 transitions. [2021-07-09 18:13:38,478 INFO L78 Accepts]: Start accepts. Automaton has 13399 states and 48435 transitions. Word has length 30 [2021-07-09 18:13:38,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:38,478 INFO L482 AbstractCegarLoop]: Abstraction has 13399 states and 48435 transitions. [2021-07-09 18:13:38,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:38,478 INFO L276 IsEmpty]: Start isEmpty. Operand 13399 states and 48435 transitions. [2021-07-09 18:13:38,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:13:38,497 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:38,497 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:38,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:38,698 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:38,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:38,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1652951515, now seen corresponding path program 41 times [2021-07-09 18:13:38,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:38,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483726030] [2021-07-09 18:13:38,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:38,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:38,875 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:38,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:38,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483726030] [2021-07-09 18:13:38,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483726030] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:38,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844242261] [2021-07-09 18:13:38,876 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:38,910 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:13:38,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:13:38,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 18:13:38,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:38,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-07-09 18:13:38,950 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:38,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:38,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:38,968 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:35 [2021-07-09 18:13:39,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:39,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-07-09 18:13:39,084 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:39,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:39,100 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:39,100 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:54 [2021-07-09 18:13:39,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:39,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2021-07-09 18:13:39,149 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:39,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:39,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:39,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-07-09 18:13:39,162 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:39,168 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:39,168 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:39,168 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:23 [2021-07-09 18:13:39,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:13:39,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:39,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:39,228 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:39,228 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:5 [2021-07-09 18:13:39,254 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:39,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844242261] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:39,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:39,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 18:13:39,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503824748] [2021-07-09 18:13:39,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:13:39,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:39,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:13:39,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:13:39,256 INFO L87 Difference]: Start difference. First operand 13399 states and 48435 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:39,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:39,621 INFO L93 Difference]: Finished difference Result 14056 states and 50400 transitions. [2021-07-09 18:13:39,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:13:39,621 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:13:39,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:39,654 INFO L225 Difference]: With dead ends: 14056 [2021-07-09 18:13:39,654 INFO L226 Difference]: Without dead ends: 14031 [2021-07-09 18:13:39,654 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 384.5ms TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:13:39,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14031 states. [2021-07-09 18:13:39,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14031 to 13418. [2021-07-09 18:13:39,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13418 states, 13417 states have (on average 3.6153387493478424) internal successors, (48507), 13417 states have internal predecessors, (48507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:39,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13418 states to 13418 states and 48507 transitions. [2021-07-09 18:13:39,989 INFO L78 Accepts]: Start accepts. Automaton has 13418 states and 48507 transitions. Word has length 30 [2021-07-09 18:13:39,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:39,989 INFO L482 AbstractCegarLoop]: Abstraction has 13418 states and 48507 transitions. [2021-07-09 18:13:39,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:39,989 INFO L276 IsEmpty]: Start isEmpty. Operand 13418 states and 48507 transitions. [2021-07-09 18:13:40,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:13:40,008 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:40,008 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:40,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:40,209 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:40,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:40,210 INFO L82 PathProgramCache]: Analyzing trace with hash -75764163, now seen corresponding path program 42 times [2021-07-09 18:13:40,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:40,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857589904] [2021-07-09 18:13:40,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:40,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:40,360 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:40,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:40,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857589904] [2021-07-09 18:13:40,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857589904] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:40,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122517905] [2021-07-09 18:13:40,361 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:40,399 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:13:40,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:13:40,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:13:40,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:40,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-07-09 18:13:40,440 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:40,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:40,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:40,453 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:38 [2021-07-09 18:13:40,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:40,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-07-09 18:13:40,490 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:40,503 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:40,504 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:40,504 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-07-09 18:13:40,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:40,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2021-07-09 18:13:40,585 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:40,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:40,594 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:40,594 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:30 [2021-07-09 18:13:40,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-07-09 18:13:40,665 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:40,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:40,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-09 18:13:40,671 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:40,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:40,673 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:40,674 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:34, output treesize:7 [2021-07-09 18:13:40,692 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:40,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122517905] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:40,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:40,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-09 18:13:40,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309111273] [2021-07-09 18:13:40,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:13:40,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:40,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:13:40,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:13:40,693 INFO L87 Difference]: Start difference. First operand 13418 states and 48507 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:41,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:41,033 INFO L93 Difference]: Finished difference Result 14584 states and 52315 transitions. [2021-07-09 18:13:41,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 18:13:41,033 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:13:41,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:41,068 INFO L225 Difference]: With dead ends: 14584 [2021-07-09 18:13:41,068 INFO L226 Difference]: Without dead ends: 14551 [2021-07-09 18:13:41,068 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 261.6ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:13:41,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14551 states. [2021-07-09 18:13:41,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14551 to 13496. [2021-07-09 18:13:41,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13496 states, 13495 states have (on average 3.615190811411634) internal successors, (48787), 13495 states have internal predecessors, (48787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:41,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13496 states to 13496 states and 48787 transitions. [2021-07-09 18:13:41,299 INFO L78 Accepts]: Start accepts. Automaton has 13496 states and 48787 transitions. Word has length 30 [2021-07-09 18:13:41,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:41,299 INFO L482 AbstractCegarLoop]: Abstraction has 13496 states and 48787 transitions. [2021-07-09 18:13:41,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:41,299 INFO L276 IsEmpty]: Start isEmpty. Operand 13496 states and 48787 transitions. [2021-07-09 18:13:41,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:13:41,318 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:41,318 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:41,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-07-09 18:13:41,519 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:41,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:41,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1496215775, now seen corresponding path program 43 times [2021-07-09 18:13:41,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:41,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293020120] [2021-07-09 18:13:41,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:41,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:41,649 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:41,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:41,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293020120] [2021-07-09 18:13:41,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293020120] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:41,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309196770] [2021-07-09 18:13:41,650 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:41,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:41,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:13:41,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:41,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-07-09 18:13:41,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:41,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:41,737 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:41,737 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-07-09 18:13:41,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:41,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-07-09 18:13:41,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:41,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:41,784 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:41,784 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-07-09 18:13:41,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:41,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-07-09 18:13:41,871 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:41,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:41,878 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:41,878 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:48 [2021-07-09 18:13:41,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-07-09 18:13:41,911 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:41,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:41,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-09 18:13:41,916 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:41,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:41,917 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:41,917 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:34, output treesize:7 [2021-07-09 18:13:41,935 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:41,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309196770] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:41,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:41,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-09 18:13:41,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645342805] [2021-07-09 18:13:41,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:13:41,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:41,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:13:41,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:13:41,936 INFO L87 Difference]: Start difference. First operand 13496 states and 48787 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:42,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:42,233 INFO L93 Difference]: Finished difference Result 14511 states and 52095 transitions. [2021-07-09 18:13:42,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 18:13:42,234 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:13:42,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:42,269 INFO L225 Difference]: With dead ends: 14511 [2021-07-09 18:13:42,269 INFO L226 Difference]: Without dead ends: 14468 [2021-07-09 18:13:42,269 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 228.0ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:13:42,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14468 states. [2021-07-09 18:13:42,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14468 to 13571. [2021-07-09 18:13:42,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13571 states, 13570 states have (on average 3.6152542372881356) internal successors, (49059), 13570 states have internal predecessors, (49059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:42,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13571 states to 13571 states and 49059 transitions. [2021-07-09 18:13:42,493 INFO L78 Accepts]: Start accepts. Automaton has 13571 states and 49059 transitions. Word has length 30 [2021-07-09 18:13:42,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:42,493 INFO L482 AbstractCegarLoop]: Abstraction has 13571 states and 49059 transitions. [2021-07-09 18:13:42,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:42,493 INFO L276 IsEmpty]: Start isEmpty. Operand 13571 states and 49059 transitions. [2021-07-09 18:13:42,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:13:42,517 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:42,517 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:42,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-07-09 18:13:42,717 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:42,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:42,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1778933477, now seen corresponding path program 44 times [2021-07-09 18:13:42,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:42,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907850958] [2021-07-09 18:13:42,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:42,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:42,830 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:42,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:42,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907850958] [2021-07-09 18:13:42,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907850958] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:42,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687557853] [2021-07-09 18:13:42,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:42,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:13:42,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:13:42,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:13:42,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:42,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-07-09 18:13:42,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:42,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:42,927 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:42,927 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:38 [2021-07-09 18:13:42,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:42,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-07-09 18:13:42,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:42,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:42,976 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:42,976 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-07-09 18:13:43,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:43,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-07-09 18:13:43,100 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:43,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:43,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:43,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2021-07-09 18:13:43,115 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:43,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:43,123 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:43,123 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:71, output treesize:32 [2021-07-09 18:13:43,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:13:43,155 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:43,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:43,157 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:43,158 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:5 [2021-07-09 18:13:43,183 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:43,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687557853] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:43,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:43,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-09 18:13:43,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019441886] [2021-07-09 18:13:43,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:13:43,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:43,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:13:43,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:13:43,185 INFO L87 Difference]: Start difference. First operand 13571 states and 49059 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:43,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:43,508 INFO L93 Difference]: Finished difference Result 14470 states and 51948 transitions. [2021-07-09 18:13:43,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 18:13:43,509 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:13:43,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:43,544 INFO L225 Difference]: With dead ends: 14470 [2021-07-09 18:13:43,544 INFO L226 Difference]: Without dead ends: 14437 [2021-07-09 18:13:43,544 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 246.2ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:13:43,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14437 states. [2021-07-09 18:13:43,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14437 to 13595. [2021-07-09 18:13:43,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13595 states, 13594 states have (on average 3.617257613653082) internal successors, (49173), 13594 states have internal predecessors, (49173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:43,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13595 states to 13595 states and 49173 transitions. [2021-07-09 18:13:43,773 INFO L78 Accepts]: Start accepts. Automaton has 13595 states and 49173 transitions. Word has length 30 [2021-07-09 18:13:43,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:43,773 INFO L482 AbstractCegarLoop]: Abstraction has 13595 states and 49173 transitions. [2021-07-09 18:13:43,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:43,773 INFO L276 IsEmpty]: Start isEmpty. Operand 13595 states and 49173 transitions. [2021-07-09 18:13:43,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:13:43,794 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:43,795 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:43,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-07-09 18:13:43,995 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:43,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:43,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1731377819, now seen corresponding path program 45 times [2021-07-09 18:13:43,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:43,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638944069] [2021-07-09 18:13:43,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:44,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:44,215 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 9 [2021-07-09 18:13:44,230 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:44,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:44,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638944069] [2021-07-09 18:13:44,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638944069] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:44,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694361609] [2021-07-09 18:13:44,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:44,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:13:44,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:13:44,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-09 18:13:44,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:44,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-07-09 18:13:44,313 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:44,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:44,325 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:44,325 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-07-09 18:13:44,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:44,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-07-09 18:13:44,360 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:44,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:44,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:44,375 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:49 [2021-07-09 18:13:44,566 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:44,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 40 [2021-07-09 18:13:44,568 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:44,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:44,599 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:44,599 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:129 [2021-07-09 18:13:44,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-07-09 18:13:44,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:44,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:44,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-07-09 18:13:44,780 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:44,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:44,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:44,783 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:34, output treesize:7 [2021-07-09 18:13:44,806 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:44,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694361609] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:44,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:44,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 18 [2021-07-09 18:13:44,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423035858] [2021-07-09 18:13:44,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:13:44,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:44,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:13:44,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:13:44,807 INFO L87 Difference]: Start difference. First operand 13595 states and 49173 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:45,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:45,595 INFO L93 Difference]: Finished difference Result 14340 states and 51475 transitions. [2021-07-09 18:13:45,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:13:45,595 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:13:45,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:45,631 INFO L225 Difference]: With dead ends: 14340 [2021-07-09 18:13:45,631 INFO L226 Difference]: Without dead ends: 14307 [2021-07-09 18:13:45,631 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 660.4ms TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:13:45,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14307 states. [2021-07-09 18:13:45,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14307 to 13642. [2021-07-09 18:13:45,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13642 states, 13641 states have (on average 3.616963565720988) internal successors, (49339), 13641 states have internal predecessors, (49339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:45,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13642 states to 13642 states and 49339 transitions. [2021-07-09 18:13:45,864 INFO L78 Accepts]: Start accepts. Automaton has 13642 states and 49339 transitions. Word has length 30 [2021-07-09 18:13:45,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:45,864 INFO L482 AbstractCegarLoop]: Abstraction has 13642 states and 49339 transitions. [2021-07-09 18:13:45,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:45,864 INFO L276 IsEmpty]: Start isEmpty. Operand 13642 states and 49339 transitions. [2021-07-09 18:13:45,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:13:45,886 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:45,886 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:46,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:46,087 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:46,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:46,087 INFO L82 PathProgramCache]: Analyzing trace with hash 711559775, now seen corresponding path program 46 times [2021-07-09 18:13:46,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:46,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427175050] [2021-07-09 18:13:46,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:46,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:46,196 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:46,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:46,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427175050] [2021-07-09 18:13:46,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427175050] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:46,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849246113] [2021-07-09 18:13:46,197 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:46,235 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:13:46,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:13:46,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:13:46,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:46,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-07-09 18:13:46,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:46,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:46,286 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:46,286 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:38 [2021-07-09 18:13:46,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:46,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-07-09 18:13:46,317 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:46,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:46,329 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:46,329 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-07-09 18:13:46,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:46,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-07-09 18:13:46,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:46,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:46,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:46,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2021-07-09 18:13:46,437 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:46,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:46,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:46,442 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:71, output treesize:32 [2021-07-09 18:13:46,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-07-09 18:13:46,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:46,466 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:46,466 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:46,466 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:5 [2021-07-09 18:13:46,486 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:46,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849246113] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:46,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:46,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-09 18:13:46,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147121590] [2021-07-09 18:13:46,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:13:46,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:46,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:13:46,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:13:46,488 INFO L87 Difference]: Start difference. First operand 13642 states and 49339 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:46,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:46,772 INFO L93 Difference]: Finished difference Result 14281 states and 51351 transitions. [2021-07-09 18:13:46,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 18:13:46,773 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:13:46,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:46,803 INFO L225 Difference]: With dead ends: 14281 [2021-07-09 18:13:46,803 INFO L226 Difference]: Without dead ends: 14189 [2021-07-09 18:13:46,804 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 210.1ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:13:46,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14189 states. [2021-07-09 18:13:46,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14189 to 13700. [2021-07-09 18:13:46,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13700 states, 13699 states have (on average 3.6152273888605007) internal successors, (49525), 13699 states have internal predecessors, (49525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:47,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13700 states to 13700 states and 49525 transitions. [2021-07-09 18:13:47,030 INFO L78 Accepts]: Start accepts. Automaton has 13700 states and 49525 transitions. Word has length 30 [2021-07-09 18:13:47,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:47,030 INFO L482 AbstractCegarLoop]: Abstraction has 13700 states and 49525 transitions. [2021-07-09 18:13:47,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:47,030 INFO L276 IsEmpty]: Start isEmpty. Operand 13700 states and 49525 transitions. [2021-07-09 18:13:47,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:13:47,053 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:47,053 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:47,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-07-09 18:13:47,254 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:47,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:47,254 INFO L82 PathProgramCache]: Analyzing trace with hash -11649061, now seen corresponding path program 47 times [2021-07-09 18:13:47,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:47,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239850316] [2021-07-09 18:13:47,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:47,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:47,364 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:47,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:47,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239850316] [2021-07-09 18:13:47,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239850316] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:47,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039722221] [2021-07-09 18:13:47,365 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:47,405 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:13:47,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:13:47,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 38 conjunts are in the unsatisfiable core [2021-07-09 18:13:47,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:47,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-07-09 18:13:47,442 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:47,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:47,454 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:47,454 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:38 [2021-07-09 18:13:47,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:47,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-07-09 18:13:47,546 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:47,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:47,562 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:47,562 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:56 [2021-07-09 18:13:47,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-07-09 18:13:47,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:47,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:47,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-07-09 18:13:47,696 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:47,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:47,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:47,704 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:24 [2021-07-09 18:13:47,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:47,790 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:47,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 45 [2021-07-09 18:13:47,812 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 18:13:47,867 INFO L628 ElimStorePlain]: treesize reduction 50, result has 47.9 percent of original size [2021-07-09 18:13:47,874 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:47,875 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:36 [2021-07-09 18:13:47,931 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:47,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039722221] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:47,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:47,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 18 [2021-07-09 18:13:47,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401550534] [2021-07-09 18:13:47,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:13:47,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:47,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:13:47,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:13:47,933 INFO L87 Difference]: Start difference. First operand 13700 states and 49525 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:49,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:49,038 INFO L93 Difference]: Finished difference Result 14565 states and 52031 transitions. [2021-07-09 18:13:49,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:13:49,038 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:13:49,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:49,071 INFO L225 Difference]: With dead ends: 14565 [2021-07-09 18:13:49,071 INFO L226 Difference]: Without dead ends: 14523 [2021-07-09 18:13:49,071 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 696.9ms TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:13:49,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14523 states. [2021-07-09 18:13:49,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14523 to 13772. [2021-07-09 18:13:49,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13772 states, 13771 states have (on average 3.614044005518844) internal successors, (49769), 13771 states have internal predecessors, (49769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:49,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13772 states to 13772 states and 49769 transitions. [2021-07-09 18:13:49,297 INFO L78 Accepts]: Start accepts. Automaton has 13772 states and 49769 transitions. Word has length 30 [2021-07-09 18:13:49,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:49,297 INFO L482 AbstractCegarLoop]: Abstraction has 13772 states and 49769 transitions. [2021-07-09 18:13:49,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:49,297 INFO L276 IsEmpty]: Start isEmpty. Operand 13772 states and 49769 transitions. [2021-07-09 18:13:49,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:13:49,320 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:49,320 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:49,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:49,521 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:49,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:49,521 INFO L82 PathProgramCache]: Analyzing trace with hash 350632385, now seen corresponding path program 48 times [2021-07-09 18:13:49,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:49,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990126700] [2021-07-09 18:13:49,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:49,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:49,564 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:13:49,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:49,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990126700] [2021-07-09 18:13:49,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990126700] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:49,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703644572] [2021-07-09 18:13:49,564 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:49,591 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:13:49,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:13:49,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:13:49,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:49,651 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:13:49,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703644572] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:49,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:49,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-07-09 18:13:49,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598702438] [2021-07-09 18:13:49,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:13:49,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:49,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:13:49,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:13:49,652 INFO L87 Difference]: Start difference. First operand 13772 states and 49769 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:49,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:49,897 INFO L93 Difference]: Finished difference Result 24395 states and 85944 transitions. [2021-07-09 18:13:49,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:13:49,897 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 18:13:49,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:49,959 INFO L225 Difference]: With dead ends: 24395 [2021-07-09 18:13:49,959 INFO L226 Difference]: Without dead ends: 24014 [2021-07-09 18:13:49,959 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 63.3ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:13:49,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24014 states. [2021-07-09 18:13:50,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24014 to 14676. [2021-07-09 18:13:50,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14676 states, 14675 states have (on average 3.6072231686541736) internal successors, (52936), 14675 states have internal predecessors, (52936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:50,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14676 states to 14676 states and 52936 transitions. [2021-07-09 18:13:50,317 INFO L78 Accepts]: Start accepts. Automaton has 14676 states and 52936 transitions. Word has length 32 [2021-07-09 18:13:50,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:50,317 INFO L482 AbstractCegarLoop]: Abstraction has 14676 states and 52936 transitions. [2021-07-09 18:13:50,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:50,317 INFO L276 IsEmpty]: Start isEmpty. Operand 14676 states and 52936 transitions. [2021-07-09 18:13:50,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:13:50,341 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:50,341 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:50,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-07-09 18:13:50,542 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:50,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:50,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1892451131, now seen corresponding path program 49 times [2021-07-09 18:13:50,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:50,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975464393] [2021-07-09 18:13:50,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:50,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:50,564 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 18:13:50,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:50,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975464393] [2021-07-09 18:13:50,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975464393] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:50,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096090087] [2021-07-09 18:13:50,564 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:50,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:50,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:13:50,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:50,692 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:50,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096090087] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:50,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:50,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-07-09 18:13:50,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120875691] [2021-07-09 18:13:50,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:13:50,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:50,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:13:50,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:13:50,693 INFO L87 Difference]: Start difference. First operand 14676 states and 52936 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:51,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:51,620 INFO L93 Difference]: Finished difference Result 38041 states and 134285 transitions. [2021-07-09 18:13:51,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 18:13:51,622 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 18:13:51,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:51,734 INFO L225 Difference]: With dead ends: 38041 [2021-07-09 18:13:51,734 INFO L226 Difference]: Without dead ends: 37600 [2021-07-09 18:13:51,735 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 468.5ms TimeCoverageRelationStatistics Valid=720, Invalid=2586, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:13:51,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37600 states. [2021-07-09 18:13:52,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37600 to 22618. [2021-07-09 18:13:52,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22618 states, 22617 states have (on average 3.6965999027280363) internal successors, (83606), 22617 states have internal predecessors, (83606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:52,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22618 states to 22618 states and 83606 transitions. [2021-07-09 18:13:52,463 INFO L78 Accepts]: Start accepts. Automaton has 22618 states and 83606 transitions. Word has length 32 [2021-07-09 18:13:52,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:52,463 INFO L482 AbstractCegarLoop]: Abstraction has 22618 states and 83606 transitions. [2021-07-09 18:13:52,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:52,463 INFO L276 IsEmpty]: Start isEmpty. Operand 22618 states and 83606 transitions. [2021-07-09 18:13:52,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:13:52,498 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:52,498 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:52,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2021-07-09 18:13:52,698 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:52,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:52,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1162824845, now seen corresponding path program 50 times [2021-07-09 18:13:52,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:52,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112957045] [2021-07-09 18:13:52,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:52,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:52,724 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:13:52,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:52,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112957045] [2021-07-09 18:13:52,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112957045] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:52,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63389669] [2021-07-09 18:13:52,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:52,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:13:52,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:13:52,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:13:52,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:52,847 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:52,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63389669] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:52,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:52,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-07-09 18:13:52,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892143491] [2021-07-09 18:13:52,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:13:52,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:52,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:13:52,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:13:52,848 INFO L87 Difference]: Start difference. First operand 22618 states and 83606 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:53,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:53,529 INFO L93 Difference]: Finished difference Result 37594 states and 131594 transitions. [2021-07-09 18:13:53,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 18:13:53,530 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 18:13:53,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:53,635 INFO L225 Difference]: With dead ends: 37594 [2021-07-09 18:13:53,635 INFO L226 Difference]: Without dead ends: 37314 [2021-07-09 18:13:53,636 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 212.9ms TimeCoverageRelationStatistics Valid=309, Invalid=881, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:13:53,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37314 states. [2021-07-09 18:13:54,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37314 to 26284. [2021-07-09 18:13:54,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26284 states, 26283 states have (on average 3.73811969714264) internal successors, (98249), 26283 states have internal predecessors, (98249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:54,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26284 states to 26284 states and 98249 transitions. [2021-07-09 18:13:54,328 INFO L78 Accepts]: Start accepts. Automaton has 26284 states and 98249 transitions. Word has length 32 [2021-07-09 18:13:54,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:54,328 INFO L482 AbstractCegarLoop]: Abstraction has 26284 states and 98249 transitions. [2021-07-09 18:13:54,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:54,328 INFO L276 IsEmpty]: Start isEmpty. Operand 26284 states and 98249 transitions. [2021-07-09 18:13:54,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:13:54,366 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:54,366 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:54,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:54,567 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:54,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:54,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1268490291, now seen corresponding path program 51 times [2021-07-09 18:13:54,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:54,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992662158] [2021-07-09 18:13:54,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:54,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:54,597 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 18:13:54,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:54,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992662158] [2021-07-09 18:13:54,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992662158] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:54,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446436400] [2021-07-09 18:13:54,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:54,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:13:54,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:13:54,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:13:54,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:54,691 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:54,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446436400] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:54,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:54,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-07-09 18:13:54,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750447878] [2021-07-09 18:13:54,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:13:54,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:54,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:13:54,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:13:54,692 INFO L87 Difference]: Start difference. First operand 26284 states and 98249 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:56,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:56,040 INFO L93 Difference]: Finished difference Result 71719 states and 253646 transitions. [2021-07-09 18:13:56,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-09 18:13:56,040 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 18:13:56,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:56,276 INFO L225 Difference]: With dead ends: 71719 [2021-07-09 18:13:56,277 INFO L226 Difference]: Without dead ends: 70740 [2021-07-09 18:13:56,277 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1471 ImplicationChecksByTransitivity, 569.7ms TimeCoverageRelationStatistics Valid=1052, Invalid=3108, Unknown=0, NotChecked=0, Total=4160 [2021-07-09 18:13:56,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70740 states. [2021-07-09 18:13:57,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70740 to 43934. [2021-07-09 18:13:57,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43934 states, 43933 states have (on average 3.7027519176928503) internal successors, (162673), 43933 states have internal predecessors, (162673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:57,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43934 states to 43934 states and 162673 transitions. [2021-07-09 18:13:57,663 INFO L78 Accepts]: Start accepts. Automaton has 43934 states and 162673 transitions. Word has length 32 [2021-07-09 18:13:57,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:57,663 INFO L482 AbstractCegarLoop]: Abstraction has 43934 states and 162673 transitions. [2021-07-09 18:13:57,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:57,663 INFO L276 IsEmpty]: Start isEmpty. Operand 43934 states and 162673 transitions. [2021-07-09 18:13:57,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:13:57,725 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:57,725 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:57,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable121 [2021-07-09 18:13:57,925 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:57,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:57,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1584127903, now seen corresponding path program 52 times [2021-07-09 18:13:57,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:57,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362912849] [2021-07-09 18:13:57,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:57,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:57,956 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:13:57,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:57,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362912849] [2021-07-09 18:13:57,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362912849] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:57,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807131175] [2021-07-09 18:13:57,957 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:58,002 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:13:58,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:13:58,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:13:58,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:58,064 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:58,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807131175] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:58,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:58,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-07-09 18:13:58,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972061598] [2021-07-09 18:13:58,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:13:58,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:58,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:13:58,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:13:58,066 INFO L87 Difference]: Start difference. First operand 43934 states and 162673 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:00,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:00,208 INFO L93 Difference]: Finished difference Result 98581 states and 351453 transitions. [2021-07-09 18:14:00,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:14:00,209 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 18:14:00,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:00,765 INFO L225 Difference]: With dead ends: 98581 [2021-07-09 18:14:00,766 INFO L226 Difference]: Without dead ends: 97759 [2021-07-09 18:14:00,766 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 308.0ms TimeCoverageRelationStatistics Valid=459, Invalid=1433, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:14:00,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97759 states. [2021-07-09 18:14:02,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97759 to 63838. [2021-07-09 18:14:02,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63838 states, 63837 states have (on average 3.7566614972508106) internal successors, (239814), 63837 states have internal predecessors, (239814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:03,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63838 states to 63838 states and 239814 transitions. [2021-07-09 18:14:03,493 INFO L78 Accepts]: Start accepts. Automaton has 63838 states and 239814 transitions. Word has length 32 [2021-07-09 18:14:03,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:03,493 INFO L482 AbstractCegarLoop]: Abstraction has 63838 states and 239814 transitions. [2021-07-09 18:14:03,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:03,494 INFO L276 IsEmpty]: Start isEmpty. Operand 63838 states and 239814 transitions. [2021-07-09 18:14:03,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:14:03,591 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:03,591 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:03,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-07-09 18:14:03,792 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:03,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:03,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1338853791, now seen corresponding path program 53 times [2021-07-09 18:14:03,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:03,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566344362] [2021-07-09 18:14:03,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:03,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:03,822 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:03,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:03,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566344362] [2021-07-09 18:14:03,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566344362] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:03,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671082383] [2021-07-09 18:14:03,823 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:03,874 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:14:03,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:14:03,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:14:03,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:04,112 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2021-07-09 18:14:04,121 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:14:04,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671082383] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:04,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:04,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-07-09 18:14:04,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313955615] [2021-07-09 18:14:04,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:14:04,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:04,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:14:04,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:14:04,122 INFO L87 Difference]: Start difference. First operand 63838 states and 239814 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:06,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:06,092 INFO L93 Difference]: Finished difference Result 104100 states and 367281 transitions. [2021-07-09 18:14:06,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-07-09 18:14:06,093 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 18:14:06,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:06,530 INFO L225 Difference]: With dead ends: 104100 [2021-07-09 18:14:06,530 INFO L226 Difference]: Without dead ends: 104049 [2021-07-09 18:14:06,531 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2147 ImplicationChecksByTransitivity, 706.7ms TimeCoverageRelationStatistics Valid=1091, Invalid=4609, Unknown=0, NotChecked=0, Total=5700 [2021-07-09 18:14:06,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104049 states. [2021-07-09 18:14:08,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104049 to 57625. [2021-07-09 18:14:08,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57625 states, 57624 states have (on average 3.721019019852839) internal successors, (214420), 57624 states have internal predecessors, (214420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:09,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57625 states to 57625 states and 214420 transitions. [2021-07-09 18:14:09,184 INFO L78 Accepts]: Start accepts. Automaton has 57625 states and 214420 transitions. Word has length 32 [2021-07-09 18:14:09,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:09,184 INFO L482 AbstractCegarLoop]: Abstraction has 57625 states and 214420 transitions. [2021-07-09 18:14:09,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:09,200 INFO L276 IsEmpty]: Start isEmpty. Operand 57625 states and 214420 transitions. [2021-07-09 18:14:09,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:14:09,286 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:09,286 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:09,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-07-09 18:14:09,487 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:09,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:09,487 INFO L82 PathProgramCache]: Analyzing trace with hash -712196979, now seen corresponding path program 54 times [2021-07-09 18:14:09,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:09,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561860069] [2021-07-09 18:14:09,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:09,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:09,525 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:14:09,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:09,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561860069] [2021-07-09 18:14:09,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561860069] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:09,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84042731] [2021-07-09 18:14:09,526 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:09,561 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:14:09,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:14:09,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:14:09,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:09,606 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 18:14:09,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84042731] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:09,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:09,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 8 [2021-07-09 18:14:09,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330290344] [2021-07-09 18:14:09,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:14:09,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:09,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:14:09,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:14:09,607 INFO L87 Difference]: Start difference. First operand 57625 states and 214420 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:10,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:10,444 INFO L93 Difference]: Finished difference Result 67508 states and 247508 transitions. [2021-07-09 18:14:10,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:14:10,445 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 18:14:10,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:10,694 INFO L225 Difference]: With dead ends: 67508 [2021-07-09 18:14:10,694 INFO L226 Difference]: Without dead ends: 67415 [2021-07-09 18:14:10,694 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 126.0ms TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:14:10,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67415 states. [2021-07-09 18:14:12,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67415 to 61524. [2021-07-09 18:14:12,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61524 states, 61523 states have (on average 3.729710839848512) internal successors, (229463), 61523 states have internal predecessors, (229463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:12,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61524 states to 61524 states and 229463 transitions. [2021-07-09 18:14:12,602 INFO L78 Accepts]: Start accepts. Automaton has 61524 states and 229463 transitions. Word has length 32 [2021-07-09 18:14:12,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:12,602 INFO L482 AbstractCegarLoop]: Abstraction has 61524 states and 229463 transitions. [2021-07-09 18:14:12,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:12,603 INFO L276 IsEmpty]: Start isEmpty. Operand 61524 states and 229463 transitions. [2021-07-09 18:14:12,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:14:12,677 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:12,677 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:12,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-07-09 18:14:12,877 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:12,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:12,877 INFO L82 PathProgramCache]: Analyzing trace with hash 52350973, now seen corresponding path program 55 times [2021-07-09 18:14:12,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:12,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839748657] [2021-07-09 18:14:12,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:12,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:13,169 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-07-09 18:14:13,183 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:14:13,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:13,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839748657] [2021-07-09 18:14:13,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839748657] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:13,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274092993] [2021-07-09 18:14:13,183 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:13,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:13,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:14:13,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:13,278 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:14:13,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274092993] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:13,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:13,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-07-09 18:14:13,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629363154] [2021-07-09 18:14:13,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:14:13,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:13,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:14:13,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:14:13,279 INFO L87 Difference]: Start difference. First operand 61524 states and 229463 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:14,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:14,108 INFO L93 Difference]: Finished difference Result 86856 states and 315465 transitions. [2021-07-09 18:14:14,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 18:14:14,109 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 18:14:14,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:14,483 INFO L225 Difference]: With dead ends: 86856 [2021-07-09 18:14:14,483 INFO L226 Difference]: Without dead ends: 86161 [2021-07-09 18:14:14,483 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 357.3ms TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:14:14,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86161 states. [2021-07-09 18:14:15,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86161 to 38467. [2021-07-09 18:14:15,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38467 states, 38466 states have (on average 3.565486403577185) internal successors, (137150), 38466 states have internal predecessors, (137150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:16,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38467 states to 38467 states and 137150 transitions. [2021-07-09 18:14:16,005 INFO L78 Accepts]: Start accepts. Automaton has 38467 states and 137150 transitions. Word has length 32 [2021-07-09 18:14:16,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:16,005 INFO L482 AbstractCegarLoop]: Abstraction has 38467 states and 137150 transitions. [2021-07-09 18:14:16,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:16,006 INFO L276 IsEmpty]: Start isEmpty. Operand 38467 states and 137150 transitions. [2021-07-09 18:14:16,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:14:16,241 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:16,241 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:16,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-07-09 18:14:16,457 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:16,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:16,457 INFO L82 PathProgramCache]: Analyzing trace with hash 166970331, now seen corresponding path program 56 times [2021-07-09 18:14:16,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:16,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600396643] [2021-07-09 18:14:16,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:16,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:16,489 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:14:16,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:16,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600396643] [2021-07-09 18:14:16,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600396643] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:16,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366570036] [2021-07-09 18:14:16,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:16,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:14:16,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:14:16,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:14:16,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:16,611 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:14:16,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366570036] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:16,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:16,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-07-09 18:14:16,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355417106] [2021-07-09 18:14:16,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:14:16,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:16,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:14:16,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:14:16,612 INFO L87 Difference]: Start difference. First operand 38467 states and 137150 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:18,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:18,275 INFO L93 Difference]: Finished difference Result 62512 states and 209555 transitions. [2021-07-09 18:14:18,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-07-09 18:14:18,278 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 18:14:18,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:18,547 INFO L225 Difference]: With dead ends: 62512 [2021-07-09 18:14:18,547 INFO L226 Difference]: Without dead ends: 62362 [2021-07-09 18:14:18,547 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2465 ImplicationChecksByTransitivity, 708.1ms TimeCoverageRelationStatistics Valid=1342, Invalid=4978, Unknown=0, NotChecked=0, Total=6320 [2021-07-09 18:14:18,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62362 states. [2021-07-09 18:14:19,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62362 to 32903. [2021-07-09 18:14:19,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32903 states, 32902 states have (on average 3.5405446477417786) internal successors, (116491), 32902 states have internal predecessors, (116491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:19,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32903 states to 32903 states and 116491 transitions. [2021-07-09 18:14:19,726 INFO L78 Accepts]: Start accepts. Automaton has 32903 states and 116491 transitions. Word has length 32 [2021-07-09 18:14:19,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:19,726 INFO L482 AbstractCegarLoop]: Abstraction has 32903 states and 116491 transitions. [2021-07-09 18:14:19,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:19,726 INFO L276 IsEmpty]: Start isEmpty. Operand 32903 states and 116491 transitions. [2021-07-09 18:14:19,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:14:19,771 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:19,771 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:19,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-07-09 18:14:19,972 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:19,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:19,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1382004005, now seen corresponding path program 57 times [2021-07-09 18:14:19,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:19,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669175331] [2021-07-09 18:14:19,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:19,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:20,000 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:20,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:20,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669175331] [2021-07-09 18:14:20,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669175331] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:20,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061806851] [2021-07-09 18:14:20,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:20,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:14:20,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:14:20,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 18:14:20,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:20,095 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:20,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061806851] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:20,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:20,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2021-07-09 18:14:20,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492002725] [2021-07-09 18:14:20,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:14:20,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:20,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:14:20,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:14:20,096 INFO L87 Difference]: Start difference. First operand 32903 states and 116491 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:21,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:21,201 INFO L93 Difference]: Finished difference Result 66122 states and 229791 transitions. [2021-07-09 18:14:21,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 18:14:21,202 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 18:14:21,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:21,668 INFO L225 Difference]: With dead ends: 66122 [2021-07-09 18:14:21,668 INFO L226 Difference]: Without dead ends: 65932 [2021-07-09 18:14:21,669 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 354.9ms TimeCoverageRelationStatistics Valid=542, Invalid=1714, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:14:21,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65932 states. [2021-07-09 18:14:22,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65932 to 46285. [2021-07-09 18:14:22,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46285 states, 46284 states have (on average 3.584024716964826) internal successors, (165883), 46284 states have internal predecessors, (165883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:23,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46285 states to 46285 states and 165883 transitions. [2021-07-09 18:14:23,099 INFO L78 Accepts]: Start accepts. Automaton has 46285 states and 165883 transitions. Word has length 32 [2021-07-09 18:14:23,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:23,099 INFO L482 AbstractCegarLoop]: Abstraction has 46285 states and 165883 transitions. [2021-07-09 18:14:23,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:23,099 INFO L276 IsEmpty]: Start isEmpty. Operand 46285 states and 165883 transitions. [2021-07-09 18:14:23,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:14:23,165 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:23,165 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:23,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:23,366 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:23,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:23,366 INFO L82 PathProgramCache]: Analyzing trace with hash 181653621, now seen corresponding path program 58 times [2021-07-09 18:14:23,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:23,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358942811] [2021-07-09 18:14:23,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:23,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:23,390 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:23,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:23,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358942811] [2021-07-09 18:14:23,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358942811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:23,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035931756] [2021-07-09 18:14:23,391 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:23,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:14:23,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:14:23,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:14:23,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:23,477 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:14:23,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035931756] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:23,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:23,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-07-09 18:14:23,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941228277] [2021-07-09 18:14:23,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 18:14:23,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:23,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 18:14:23,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:14:23,478 INFO L87 Difference]: Start difference. First operand 46285 states and 165883 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:24,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:24,309 INFO L93 Difference]: Finished difference Result 69367 states and 244742 transitions. [2021-07-09 18:14:24,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 18:14:24,310 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 18:14:24,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:24,544 INFO L225 Difference]: With dead ends: 69367 [2021-07-09 18:14:24,544 INFO L226 Difference]: Without dead ends: 69341 [2021-07-09 18:14:24,544 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 31.2ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:14:24,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69341 states. [2021-07-09 18:14:26,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69341 to 62799. [2021-07-09 18:14:26,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62799 states, 62798 states have (on average 3.5969776107519347) internal successors, (225883), 62798 states have internal predecessors, (225883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:26,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62799 states to 62799 states and 225883 transitions. [2021-07-09 18:14:26,551 INFO L78 Accepts]: Start accepts. Automaton has 62799 states and 225883 transitions. Word has length 32 [2021-07-09 18:14:26,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:26,551 INFO L482 AbstractCegarLoop]: Abstraction has 62799 states and 225883 transitions. [2021-07-09 18:14:26,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:26,551 INFO L276 IsEmpty]: Start isEmpty. Operand 62799 states and 225883 transitions. [2021-07-09 18:14:26,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:14:26,624 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:26,624 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:26,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-07-09 18:14:26,825 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:26,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:26,825 INFO L82 PathProgramCache]: Analyzing trace with hash 991552283, now seen corresponding path program 59 times [2021-07-09 18:14:26,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:26,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489161057] [2021-07-09 18:14:26,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:26,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:27,183 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:27,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:27,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489161057] [2021-07-09 18:14:27,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489161057] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:27,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164077450] [2021-07-09 18:14:27,184 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:27,225 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:14:27,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:14:27,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:14:27,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:27,268 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:14:27,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164077450] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:27,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:27,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 7 [2021-07-09 18:14:27,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944157561] [2021-07-09 18:14:27,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:14:27,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:27,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:14:27,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:14:27,269 INFO L87 Difference]: Start difference. First operand 62799 states and 225883 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:27,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:27,760 INFO L93 Difference]: Finished difference Result 67770 states and 240391 transitions. [2021-07-09 18:14:27,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:14:27,760 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 18:14:27,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:28,279 INFO L225 Difference]: With dead ends: 67770 [2021-07-09 18:14:28,279 INFO L226 Difference]: Without dead ends: 67754 [2021-07-09 18:14:28,280 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 108.0ms TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:14:28,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67754 states. [2021-07-09 18:14:29,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67754 to 62924. [2021-07-09 18:14:29,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62924 states, 62923 states have (on average 3.5905630691480064) internal successors, (225929), 62923 states have internal predecessors, (225929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:29,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62924 states to 62924 states and 225929 transitions. [2021-07-09 18:14:29,935 INFO L78 Accepts]: Start accepts. Automaton has 62924 states and 225929 transitions. Word has length 32 [2021-07-09 18:14:29,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:29,935 INFO L482 AbstractCegarLoop]: Abstraction has 62924 states and 225929 transitions. [2021-07-09 18:14:29,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:29,935 INFO L276 IsEmpty]: Start isEmpty. Operand 62924 states and 225929 transitions. [2021-07-09 18:14:30,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:14:30,357 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:30,357 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:30,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:30,573 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:30,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:30,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1881778081, now seen corresponding path program 60 times [2021-07-09 18:14:30,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:30,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780112948] [2021-07-09 18:14:30,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:30,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:30,600 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 18:14:30,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:30,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780112948] [2021-07-09 18:14:30,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780112948] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:30,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140344813] [2021-07-09 18:14:30,600 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:30,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:14:30,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:14:30,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:14:30,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:30,671 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 18:14:30,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140344813] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:30,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:30,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-07-09 18:14:30,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197038093] [2021-07-09 18:14:30,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:14:30,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:30,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:14:30,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:14:30,672 INFO L87 Difference]: Start difference. First operand 62924 states and 225929 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:31,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:31,691 INFO L93 Difference]: Finished difference Result 101393 states and 366566 transitions. [2021-07-09 18:14:31,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:14:31,692 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:14:31,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:32,129 INFO L225 Difference]: With dead ends: 101393 [2021-07-09 18:14:32,129 INFO L226 Difference]: Without dead ends: 100289 [2021-07-09 18:14:32,129 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 50.7ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:14:32,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100289 states. [2021-07-09 18:14:34,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100289 to 96675. [2021-07-09 18:14:34,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96675 states, 96674 states have (on average 3.5802801166808034) internal successors, (346120), 96674 states have internal predecessors, (346120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:35,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96675 states to 96675 states and 346120 transitions. [2021-07-09 18:14:35,673 INFO L78 Accepts]: Start accepts. Automaton has 96675 states and 346120 transitions. Word has length 33 [2021-07-09 18:14:35,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:35,674 INFO L482 AbstractCegarLoop]: Abstraction has 96675 states and 346120 transitions. [2021-07-09 18:14:35,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:35,674 INFO L276 IsEmpty]: Start isEmpty. Operand 96675 states and 346120 transitions. [2021-07-09 18:14:35,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:14:35,800 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:35,800 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:36,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:36,001 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:36,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:36,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1963622161, now seen corresponding path program 61 times [2021-07-09 18:14:36,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:36,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306457668] [2021-07-09 18:14:36,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:36,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:36,037 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:36,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:36,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306457668] [2021-07-09 18:14:36,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306457668] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:36,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940146634] [2021-07-09 18:14:36,038 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:36,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:36,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:14:36,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:36,103 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:14:36,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940146634] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:36,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:36,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-09 18:14:36,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289697816] [2021-07-09 18:14:36,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:14:36,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:36,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:14:36,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:14:36,104 INFO L87 Difference]: Start difference. First operand 96675 states and 346120 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:38,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:38,057 INFO L93 Difference]: Finished difference Result 158885 states and 567488 transitions. [2021-07-09 18:14:38,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:14:38,057 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:14:38,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:39,275 INFO L225 Difference]: With dead ends: 158885 [2021-07-09 18:14:39,275 INFO L226 Difference]: Without dead ends: 155743 [2021-07-09 18:14:39,276 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 54.0ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:14:39,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155743 states. [2021-07-09 18:14:42,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155743 to 151324. [2021-07-09 18:14:43,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151324 states, 151323 states have (on average 3.541411417960257) internal successors, (535897), 151323 states have internal predecessors, (535897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:44,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151324 states to 151324 states and 535897 transitions. [2021-07-09 18:14:44,341 INFO L78 Accepts]: Start accepts. Automaton has 151324 states and 535897 transitions. Word has length 33 [2021-07-09 18:14:44,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:44,341 INFO L482 AbstractCegarLoop]: Abstraction has 151324 states and 535897 transitions. [2021-07-09 18:14:44,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:44,341 INFO L276 IsEmpty]: Start isEmpty. Operand 151324 states and 535897 transitions. [2021-07-09 18:14:44,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:14:44,504 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:44,504 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:44,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:44,705 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:44,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:44,705 INFO L82 PathProgramCache]: Analyzing trace with hash -583238421, now seen corresponding path program 62 times [2021-07-09 18:14:44,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:44,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276988146] [2021-07-09 18:14:44,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:44,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:45,163 WARN L205 SmtUtils]: Spent 438.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-07-09 18:14:45,197 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:45,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:45,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276988146] [2021-07-09 18:14:45,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276988146] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:45,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396731479] [2021-07-09 18:14:45,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:45,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:14:45,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:14:45,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:14:45,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:45,297 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:14:45,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396731479] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:45,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:45,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 12 [2021-07-09 18:14:45,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490359824] [2021-07-09 18:14:45,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:14:45,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:45,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:14:45,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:14:45,298 INFO L87 Difference]: Start difference. First operand 151324 states and 535897 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:46,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:46,568 INFO L93 Difference]: Finished difference Result 73830 states and 259251 transitions. [2021-07-09 18:14:46,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-09 18:14:46,569 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:14:46,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:46,819 INFO L225 Difference]: With dead ends: 73830 [2021-07-09 18:14:46,819 INFO L226 Difference]: Without dead ends: 73783 [2021-07-09 18:14:46,819 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1391 ImplicationChecksByTransitivity, 1024.7ms TimeCoverageRelationStatistics Valid=918, Invalid=2988, Unknown=0, NotChecked=0, Total=3906 [2021-07-09 18:14:46,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73783 states. [2021-07-09 18:14:48,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73783 to 50528. [2021-07-09 18:14:48,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50528 states, 50527 states have (on average 3.63951946484058) internal successors, (183894), 50527 states have internal predecessors, (183894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:48,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50528 states to 50528 states and 183894 transitions. [2021-07-09 18:14:48,847 INFO L78 Accepts]: Start accepts. Automaton has 50528 states and 183894 transitions. Word has length 33 [2021-07-09 18:14:48,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:48,847 INFO L482 AbstractCegarLoop]: Abstraction has 50528 states and 183894 transitions. [2021-07-09 18:14:48,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:48,847 INFO L276 IsEmpty]: Start isEmpty. Operand 50528 states and 183894 transitions. [2021-07-09 18:14:48,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:14:48,919 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:48,919 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:49,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:49,119 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:49,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:49,120 INFO L82 PathProgramCache]: Analyzing trace with hash 815112445, now seen corresponding path program 63 times [2021-07-09 18:14:49,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:49,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031778286] [2021-07-09 18:14:49,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:49,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:49,145 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 18:14:49,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:49,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031778286] [2021-07-09 18:14:49,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031778286] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:49,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871834972] [2021-07-09 18:14:49,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:49,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:14:49,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:14:49,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:14:49,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:49,216 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 18:14:49,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871834972] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:49,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:49,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-07-09 18:14:49,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687677469] [2021-07-09 18:14:49,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 18:14:49,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:49,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 18:14:49,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:14:49,217 INFO L87 Difference]: Start difference. First operand 50528 states and 183894 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:49,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:49,918 INFO L93 Difference]: Finished difference Result 67328 states and 238782 transitions. [2021-07-09 18:14:49,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:14:49,919 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 18:14:49,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:50,182 INFO L225 Difference]: With dead ends: 67328 [2021-07-09 18:14:50,183 INFO L226 Difference]: Without dead ends: 67317 [2021-07-09 18:14:50,183 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 37.9ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:14:50,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67317 states. [2021-07-09 18:14:51,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67317 to 50483. [2021-07-09 18:14:51,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50483 states, 50482 states have (on average 3.639277366189929) internal successors, (183718), 50482 states have internal predecessors, (183718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:51,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50483 states to 50483 states and 183718 transitions. [2021-07-09 18:14:51,820 INFO L78 Accepts]: Start accepts. Automaton has 50483 states and 183718 transitions. Word has length 34 [2021-07-09 18:14:51,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:51,820 INFO L482 AbstractCegarLoop]: Abstraction has 50483 states and 183718 transitions. [2021-07-09 18:14:51,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:51,820 INFO L276 IsEmpty]: Start isEmpty. Operand 50483 states and 183718 transitions. [2021-07-09 18:14:52,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 18:14:52,153 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:52,153 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:52,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-07-09 18:14:52,376 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:52,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:52,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1120487123, now seen corresponding path program 64 times [2021-07-09 18:14:52,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:52,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313798681] [2021-07-09 18:14:52,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:52,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:52,405 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:14:52,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:52,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313798681] [2021-07-09 18:14:52,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313798681] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:52,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648557789] [2021-07-09 18:14:52,405 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:52,437 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:14:52,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:14:52,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:14:52,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:52,480 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:14:52,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648557789] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:52,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:52,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-07-09 18:14:52,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121710245] [2021-07-09 18:14:52,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:14:52,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:52,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:14:52,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:14:52,485 INFO L87 Difference]: Start difference. First operand 50483 states and 183718 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:52,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:52,909 INFO L93 Difference]: Finished difference Result 60966 states and 217660 transitions. [2021-07-09 18:14:52,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:14:52,910 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 18:14:52,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:53,113 INFO L225 Difference]: With dead ends: 60966 [2021-07-09 18:14:53,113 INFO L226 Difference]: Without dead ends: 60900 [2021-07-09 18:14:53,113 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 49.7ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:14:53,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60900 states. [2021-07-09 18:14:54,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60900 to 56017. [2021-07-09 18:14:54,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56017 states, 56016 states have (on average 3.6197157954870036) internal successors, (202762), 56016 states have internal predecessors, (202762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:54,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56017 states to 56017 states and 202762 transitions. [2021-07-09 18:14:54,967 INFO L78 Accepts]: Start accepts. Automaton has 56017 states and 202762 transitions. Word has length 35 [2021-07-09 18:14:54,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:54,967 INFO L482 AbstractCegarLoop]: Abstraction has 56017 states and 202762 transitions. [2021-07-09 18:14:54,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:54,967 INFO L276 IsEmpty]: Start isEmpty. Operand 56017 states and 202762 transitions. [2021-07-09 18:14:55,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 18:14:55,049 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:55,049 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:55,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-07-09 18:14:55,253 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:55,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:55,253 INFO L82 PathProgramCache]: Analyzing trace with hash -78377335, now seen corresponding path program 65 times [2021-07-09 18:14:55,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:55,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951106943] [2021-07-09 18:14:55,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:55,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:55,318 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:14:55,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:55,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951106943] [2021-07-09 18:14:55,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951106943] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:55,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041680483] [2021-07-09 18:14:55,319 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:55,348 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:14:55,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:14:55,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:14:55,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:55,398 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:14:55,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041680483] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:55,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:55,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 9 [2021-07-09 18:14:55,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901651673] [2021-07-09 18:14:55,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:14:55,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:55,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:14:55,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:14:55,399 INFO L87 Difference]: Start difference. First operand 56017 states and 202762 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:56,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:56,749 INFO L93 Difference]: Finished difference Result 118073 states and 409632 transitions. [2021-07-09 18:14:56,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:14:56,750 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 18:14:56,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:57,535 INFO L225 Difference]: With dead ends: 118073 [2021-07-09 18:14:57,535 INFO L226 Difference]: Without dead ends: 117995 [2021-07-09 18:14:57,535 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 253.8ms TimeCoverageRelationStatistics Valid=346, Invalid=844, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:14:57,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117995 states. [2021-07-09 18:15:00,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117995 to 88498. [2021-07-09 18:15:00,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88498 states, 88497 states have (on average 3.63666564968304) internal successors, (321834), 88497 states have internal predecessors, (321834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:00,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88498 states to 88498 states and 321834 transitions. [2021-07-09 18:15:00,789 INFO L78 Accepts]: Start accepts. Automaton has 88498 states and 321834 transitions. Word has length 35 [2021-07-09 18:15:00,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:15:00,789 INFO L482 AbstractCegarLoop]: Abstraction has 88498 states and 321834 transitions. [2021-07-09 18:15:00,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:00,790 INFO L276 IsEmpty]: Start isEmpty. Operand 88498 states and 321834 transitions. [2021-07-09 18:15:00,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 18:15:00,880 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:15:00,880 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:15:01,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-07-09 18:15:01,081 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:15:01,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:15:01,081 INFO L82 PathProgramCache]: Analyzing trace with hash 555519681, now seen corresponding path program 66 times [2021-07-09 18:15:01,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:15:01,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124234037] [2021-07-09 18:15:01,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:15:01,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:01,117 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:15:01,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:01,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124234037] [2021-07-09 18:15:01,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124234037] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:01,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501909239] [2021-07-09 18:15:01,117 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:01,536 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:15:01,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:15:01,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:15:01,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:01,598 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:15:01,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501909239] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:01,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:01,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 10 [2021-07-09 18:15:01,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567302094] [2021-07-09 18:15:01,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:15:01,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:01,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:15:01,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:15:01,600 INFO L87 Difference]: Start difference. First operand 88498 states and 321834 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:03,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:15:03,114 INFO L93 Difference]: Finished difference Result 122190 states and 421034 transitions. [2021-07-09 18:15:03,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:15:03,115 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 18:15:03,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:15:03,683 INFO L225 Difference]: With dead ends: 122190 [2021-07-09 18:15:03,683 INFO L226 Difference]: Without dead ends: 122034 [2021-07-09 18:15:03,683 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 306.0ms TimeCoverageRelationStatistics Valid=481, Invalid=1159, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:15:04,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122034 states. [2021-07-09 18:15:06,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122034 to 77938. [2021-07-09 18:15:06,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77938 states, 77937 states have (on average 3.6076061434235345) internal successors, (281166), 77937 states have internal predecessors, (281166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:07,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77938 states to 77938 states and 281166 transitions. [2021-07-09 18:15:07,261 INFO L78 Accepts]: Start accepts. Automaton has 77938 states and 281166 transitions. Word has length 35 [2021-07-09 18:15:07,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:15:07,261 INFO L482 AbstractCegarLoop]: Abstraction has 77938 states and 281166 transitions. [2021-07-09 18:15:07,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:07,261 INFO L276 IsEmpty]: Start isEmpty. Operand 77938 states and 281166 transitions. [2021-07-09 18:15:07,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 18:15:07,353 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:15:07,353 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:15:07,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-07-09 18:15:07,554 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:15:07,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:15:07,554 INFO L82 PathProgramCache]: Analyzing trace with hash 742728831, now seen corresponding path program 67 times [2021-07-09 18:15:07,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:15:07,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627384433] [2021-07-09 18:15:07,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:15:07,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:07,581 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:15:07,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:07,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627384433] [2021-07-09 18:15:07,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627384433] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:07,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355694851] [2021-07-09 18:15:07,582 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:07,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:07,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:15:07,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:07,655 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:15:07,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355694851] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:07,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:07,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-07-09 18:15:07,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142166246] [2021-07-09 18:15:07,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:15:07,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:07,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:15:07,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:15:07,656 INFO L87 Difference]: Start difference. First operand 77938 states and 281166 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:08,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:15:08,506 INFO L93 Difference]: Finished difference Result 80312 states and 287928 transitions. [2021-07-09 18:15:08,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:15:08,506 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 18:15:08,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:15:08,804 INFO L225 Difference]: With dead ends: 80312 [2021-07-09 18:15:08,804 INFO L226 Difference]: Without dead ends: 80041 [2021-07-09 18:15:08,804 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 41.1ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:15:08,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80041 states. [2021-07-09 18:15:10,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80041 to 75729. [2021-07-09 18:15:10,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75729 states, 75728 states have (on average 3.5912872385379253) internal successors, (271961), 75728 states have internal predecessors, (271961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:11,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75729 states to 75729 states and 271961 transitions. [2021-07-09 18:15:11,145 INFO L78 Accepts]: Start accepts. Automaton has 75729 states and 271961 transitions. Word has length 35 [2021-07-09 18:15:11,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:15:11,145 INFO L482 AbstractCegarLoop]: Abstraction has 75729 states and 271961 transitions. [2021-07-09 18:15:11,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:11,145 INFO L276 IsEmpty]: Start isEmpty. Operand 75729 states and 271961 transitions. [2021-07-09 18:15:11,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 18:15:11,221 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:15:11,221 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:15:11,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:11,422 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:15:11,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:15:11,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1005636645, now seen corresponding path program 68 times [2021-07-09 18:15:11,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:15:11,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752514778] [2021-07-09 18:15:11,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:15:11,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:11,464 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:15:11,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:11,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752514778] [2021-07-09 18:15:11,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752514778] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:11,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237897833] [2021-07-09 18:15:11,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:11,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:15:11,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:15:11,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:15:11,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:11,555 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:15:11,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237897833] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:11,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:11,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-07-09 18:15:11,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633796659] [2021-07-09 18:15:11,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:15:11,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:11,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:15:11,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:15:11,556 INFO L87 Difference]: Start difference. First operand 75729 states and 271961 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:11,942 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-07-09 18:15:12,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:15:12,475 INFO L93 Difference]: Finished difference Result 83624 states and 298075 transitions. [2021-07-09 18:15:12,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:15:12,476 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 18:15:12,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:15:13,094 INFO L225 Difference]: With dead ends: 83624 [2021-07-09 18:15:13,094 INFO L226 Difference]: Without dead ends: 83624 [2021-07-09 18:15:13,095 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 414.3ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:15:13,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83624 states. [2021-07-09 18:15:14,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83624 to 80321. [2021-07-09 18:15:15,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80321 states, 80320 states have (on average 3.585520418326693) internal successors, (287989), 80320 states have internal predecessors, (287989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:16,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80321 states to 80321 states and 287989 transitions. [2021-07-09 18:15:16,099 INFO L78 Accepts]: Start accepts. Automaton has 80321 states and 287989 transitions. Word has length 35 [2021-07-09 18:15:16,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:15:16,100 INFO L482 AbstractCegarLoop]: Abstraction has 80321 states and 287989 transitions. [2021-07-09 18:15:16,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:16,100 INFO L276 IsEmpty]: Start isEmpty. Operand 80321 states and 287989 transitions. [2021-07-09 18:15:16,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 18:15:16,193 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:15:16,193 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:15:16,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-07-09 18:15:16,393 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:15:16,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:15:16,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1649480959, now seen corresponding path program 69 times [2021-07-09 18:15:16,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:15:16,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531086345] [2021-07-09 18:15:16,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:15:16,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:16,415 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:15:16,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:16,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531086345] [2021-07-09 18:15:16,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531086345] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:16,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10485973] [2021-07-09 18:15:16,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:16,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:15:16,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:15:16,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:15:16,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:16,512 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:15:16,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10485973] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:16,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:16,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-07-09 18:15:16,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824258794] [2021-07-09 18:15:16,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:15:16,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:16,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:15:16,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:15:16,513 INFO L87 Difference]: Start difference. First operand 80321 states and 287989 transitions. Second operand has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:18,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:15:18,542 INFO L93 Difference]: Finished difference Result 101331 states and 352560 transitions. [2021-07-09 18:15:18,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-09 18:15:18,542 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 18:15:18,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:15:18,996 INFO L225 Difference]: With dead ends: 101331 [2021-07-09 18:15:18,997 INFO L226 Difference]: Without dead ends: 101208 [2021-07-09 18:15:18,997 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1635 ImplicationChecksByTransitivity, 492.9ms TimeCoverageRelationStatistics Valid=897, Invalid=3659, Unknown=0, NotChecked=0, Total=4556 [2021-07-09 18:15:19,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101208 states. [2021-07-09 18:15:21,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101208 to 87809. [2021-07-09 18:15:21,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87809 states, 87808 states have (on average 3.5959252004373177) internal successors, (315751), 87808 states have internal predecessors, (315751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:22,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87809 states to 87809 states and 315751 transitions. [2021-07-09 18:15:22,077 INFO L78 Accepts]: Start accepts. Automaton has 87809 states and 315751 transitions. Word has length 35 [2021-07-09 18:15:22,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:15:22,077 INFO L482 AbstractCegarLoop]: Abstraction has 87809 states and 315751 transitions. [2021-07-09 18:15:22,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:22,077 INFO L276 IsEmpty]: Start isEmpty. Operand 87809 states and 315751 transitions. [2021-07-09 18:15:22,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:15:22,212 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:15:22,212 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:15:22,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-07-09 18:15:22,412 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:15:22,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:15:22,413 INFO L82 PathProgramCache]: Analyzing trace with hash -574248849, now seen corresponding path program 70 times [2021-07-09 18:15:22,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:15:22,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510596336] [2021-07-09 18:15:22,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:15:22,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:22,703 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:22,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:22,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510596336] [2021-07-09 18:15:22,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510596336] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:22,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36665643] [2021-07-09 18:15:22,704 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:22,734 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:15:22,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:15:22,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:15:22,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:22,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-07-09 18:15:22,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:22,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:22,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:15:22,844 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:47 [2021-07-09 18:15:22,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:22,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2021-07-09 18:15:22,924 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:22,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:22,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:15:22,942 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:69, output treesize:68 [2021-07-09 18:15:23,049 INFO L446 ElimStorePlain]: Different costs {3=[v_C_81], 12=[A, B]} [2021-07-09 18:15:23,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:23,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:23,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:23,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 57 [2021-07-09 18:15:23,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:23,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:23,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:23,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:23,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:23,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:23,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:23,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:23,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 56 [2021-07-09 18:15:23,083 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:23,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:23,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:23,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:23,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:23,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:23,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:23,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:23,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 27 [2021-07-09 18:15:23,110 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:23,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:23,117 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:15:23,117 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:35 [2021-07-09 18:15:23,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-07-09 18:15:23,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:23,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:23,160 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:15:23,160 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:5 [2021-07-09 18:15:23,178 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:23,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36665643] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:23,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:23,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-07-09 18:15:23,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359017494] [2021-07-09 18:15:23,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:15:23,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:23,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:15:23,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:15:23,179 INFO L87 Difference]: Start difference. First operand 87809 states and 315751 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:24,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:15:24,494 INFO L93 Difference]: Finished difference Result 88427 states and 317563 transitions. [2021-07-09 18:15:24,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:15:24,494 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:15:24,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:15:25,084 INFO L225 Difference]: With dead ends: 88427 [2021-07-09 18:15:25,084 INFO L226 Difference]: Without dead ends: 88378 [2021-07-09 18:15:25,084 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 520.7ms TimeCoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:15:25,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88378 states. [2021-07-09 18:15:26,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88378 to 87916. [2021-07-09 18:15:26,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87916 states, 87915 states have (on average 3.5953136552351705) internal successors, (316082), 87915 states have internal predecessors, (316082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:27,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87916 states to 87916 states and 316082 transitions. [2021-07-09 18:15:27,508 INFO L78 Accepts]: Start accepts. Automaton has 87916 states and 316082 transitions. Word has length 37 [2021-07-09 18:15:27,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:15:27,508 INFO L482 AbstractCegarLoop]: Abstraction has 87916 states and 316082 transitions. [2021-07-09 18:15:27,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:27,508 INFO L276 IsEmpty]: Start isEmpty. Operand 87916 states and 316082 transitions. [2021-07-09 18:15:27,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:15:27,627 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:15:27,627 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:15:27,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:27,828 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:15:27,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:15:27,829 INFO L82 PathProgramCache]: Analyzing trace with hash 608977305, now seen corresponding path program 71 times [2021-07-09 18:15:27,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:15:27,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135991397] [2021-07-09 18:15:27,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:15:27,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:28,120 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:28,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:28,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135991397] [2021-07-09 18:15:28,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135991397] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:28,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881010122] [2021-07-09 18:15:28,121 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:28,152 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:15:28,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:15:28,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:15:28,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:28,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-07-09 18:15:28,277 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:28,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:28,292 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:15:28,292 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:53 [2021-07-09 18:15:28,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:28,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:28,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 37 [2021-07-09 18:15:28,804 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:28,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:28,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:15:28,823 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:72 [2021-07-09 18:15:28,890 INFO L446 ElimStorePlain]: Different costs {3=[v_C_84], 12=[A, B]} [2021-07-09 18:15:28,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:28,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:28,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:28,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-07-09 18:15:28,897 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:28,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:28,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:28,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:28,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:28,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:28,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:28,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:28,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:28,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:28,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2021-07-09 18:15:28,926 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:28,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:28,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:28,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:28,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:28,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:28,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:28,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:28,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:28,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:28,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 28 [2021-07-09 18:15:28,946 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:28,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:28,957 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 3 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:15:28,957 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:84, output treesize:31 [2021-07-09 18:15:29,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:29,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:29,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-07-09 18:15:29,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:29,068 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:29,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:15:29,069 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:5 [2021-07-09 18:15:29,094 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:29,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881010122] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:29,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:29,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 18:15:29,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764646308] [2021-07-09 18:15:29,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:15:29,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:29,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:15:29,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:15:29,095 INFO L87 Difference]: Start difference. First operand 87916 states and 316082 transitions. Second operand has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:30,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:15:30,619 INFO L93 Difference]: Finished difference Result 88493 states and 317776 transitions. [2021-07-09 18:15:30,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:15:30,619 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:15:30,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:15:30,948 INFO L225 Difference]: With dead ends: 88493 [2021-07-09 18:15:30,948 INFO L226 Difference]: Without dead ends: 88417 [2021-07-09 18:15:30,948 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 735.1ms TimeCoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:15:31,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88417 states. [2021-07-09 18:15:32,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88417 to 87893. [2021-07-09 18:15:33,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87893 states, 87892 states have (on average 3.5957538797615256) internal successors, (316038), 87892 states have internal predecessors, (316038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:33,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87893 states to 87893 states and 316038 transitions. [2021-07-09 18:15:33,782 INFO L78 Accepts]: Start accepts. Automaton has 87893 states and 316038 transitions. Word has length 37 [2021-07-09 18:15:33,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:15:33,782 INFO L482 AbstractCegarLoop]: Abstraction has 87893 states and 316038 transitions. [2021-07-09 18:15:33,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:33,783 INFO L276 IsEmpty]: Start isEmpty. Operand 87893 states and 316038 transitions. [2021-07-09 18:15:33,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:15:33,906 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:15:33,906 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:15:34,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:34,106 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:15:34,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:15:34,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1295974865, now seen corresponding path program 72 times [2021-07-09 18:15:34,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:15:34,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364814824] [2021-07-09 18:15:34,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:15:34,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:34,397 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:34,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:34,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364814824] [2021-07-09 18:15:34,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364814824] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:34,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637338693] [2021-07-09 18:15:34,397 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:34,436 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:15:34,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:15:34,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 18:15:34,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:34,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-07-09 18:15:34,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:34,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:34,677 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:15:34,677 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:60, output treesize:59 [2021-07-09 18:15:34,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:34,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-07-09 18:15:34,751 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:34,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:34,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:15:34,776 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:77, output treesize:76 [2021-07-09 18:15:35,027 INFO L446 ElimStorePlain]: Different costs {3=[v_C_87], 7=[A, B]} [2021-07-09 18:15:35,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:35,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:35,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 47 [2021-07-09 18:15:35,032 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:35,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:35,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:35,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:35,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:35,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:35,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:35,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:35,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 46 [2021-07-09 18:15:35,059 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:35,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:35,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:35,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:35,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:35,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:35,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:35,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:35,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 18 [2021-07-09 18:15:35,078 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:35,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:35,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:15:35,088 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:85, output treesize:27 [2021-07-09 18:15:35,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-07-09 18:15:35,132 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:35,134 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:35,134 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:15:35,134 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:5 [2021-07-09 18:15:35,154 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:35,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637338693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:35,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:35,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-09 18:15:35,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219197901] [2021-07-09 18:15:35,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:15:35,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:35,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:15:35,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=457, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:15:35,155 INFO L87 Difference]: Start difference. First operand 87893 states and 316038 transitions. Second operand has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:37,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:15:37,591 INFO L93 Difference]: Finished difference Result 88599 states and 318079 transitions. [2021-07-09 18:15:37,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:15:37,592 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:15:37,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:15:37,925 INFO L225 Difference]: With dead ends: 88599 [2021-07-09 18:15:37,926 INFO L226 Difference]: Without dead ends: 88523 [2021-07-09 18:15:37,926 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1113.7ms TimeCoverageRelationStatistics Valid=91, Invalid=901, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:15:38,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88523 states. [2021-07-09 18:15:39,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88523 to 87951. [2021-07-09 18:15:39,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87951 states, 87950 states have (on average 3.5954064809550883) internal successors, (316216), 87950 states have internal predecessors, (316216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:40,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87951 states to 87951 states and 316216 transitions. [2021-07-09 18:15:40,751 INFO L78 Accepts]: Start accepts. Automaton has 87951 states and 316216 transitions. Word has length 37 [2021-07-09 18:15:40,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:15:40,751 INFO L482 AbstractCegarLoop]: Abstraction has 87951 states and 316216 transitions. [2021-07-09 18:15:40,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:40,751 INFO L276 IsEmpty]: Start isEmpty. Operand 87951 states and 316216 transitions. [2021-07-09 18:15:40,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:15:40,874 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:15:40,874 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:15:41,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:41,075 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:15:41,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:15:41,075 INFO L82 PathProgramCache]: Analyzing trace with hash -112748711, now seen corresponding path program 73 times [2021-07-09 18:15:41,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:15:41,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054070676] [2021-07-09 18:15:41,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:15:41,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:41,365 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:41,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:41,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054070676] [2021-07-09 18:15:41,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054070676] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:41,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944334958] [2021-07-09 18:15:41,366 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:41,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:41,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:15:41,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:41,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-07-09 18:15:41,498 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:41,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:41,509 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:15:41,509 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:47 [2021-07-09 18:15:41,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:41,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-07-09 18:15:41,550 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:41,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:41,564 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:15:41,564 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:65, output treesize:64 [2021-07-09 18:15:41,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2021-07-09 18:15:41,651 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:41,657 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:41,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-07-09 18:15:41,661 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:41,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:41,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2021-07-09 18:15:41,667 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:41,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:41,672 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:15:41,672 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:67, output treesize:23 [2021-07-09 18:15:41,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-07-09 18:15:41,734 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:41,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:41,736 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:15:41,736 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:5 [2021-07-09 18:15:41,757 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:41,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944334958] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:41,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:41,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-07-09 18:15:41,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129781967] [2021-07-09 18:15:41,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:15:41,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:41,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:15:41,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:15:41,758 INFO L87 Difference]: Start difference. First operand 87951 states and 316216 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:43,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:15:43,548 INFO L93 Difference]: Finished difference Result 88564 states and 318014 transitions. [2021-07-09 18:15:43,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:15:43,549 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:15:43,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:15:43,899 INFO L225 Difference]: With dead ends: 88564 [2021-07-09 18:15:43,899 INFO L226 Difference]: Without dead ends: 88488 [2021-07-09 18:15:43,899 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 615.5ms TimeCoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:15:43,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88488 states. [2021-07-09 18:15:45,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88488 to 87933. [2021-07-09 18:15:45,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87933 states, 87932 states have (on average 3.5955965973706956) internal successors, (316168), 87932 states have internal predecessors, (316168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:46,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87933 states to 87933 states and 316168 transitions. [2021-07-09 18:15:46,295 INFO L78 Accepts]: Start accepts. Automaton has 87933 states and 316168 transitions. Word has length 37 [2021-07-09 18:15:46,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:15:46,295 INFO L482 AbstractCegarLoop]: Abstraction has 87933 states and 316168 transitions. [2021-07-09 18:15:46,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:46,295 INFO L276 IsEmpty]: Start isEmpty. Operand 87933 states and 316168 transitions. [2021-07-09 18:15:46,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:15:46,406 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:15:46,406 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:15:46,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:46,607 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:15:46,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:15:46,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1854752227, now seen corresponding path program 74 times [2021-07-09 18:15:46,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:15:46,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806174354] [2021-07-09 18:15:46,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:15:46,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:47,057 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:47,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:47,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806174354] [2021-07-09 18:15:47,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806174354] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:47,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839104034] [2021-07-09 18:15:47,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:47,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:15:47,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:15:47,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:15:47,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:47,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-07-09 18:15:47,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:47,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:47,566 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:15:47,566 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:47 [2021-07-09 18:15:47,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:47,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-07-09 18:15:47,609 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:47,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:47,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:15:47,627 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:65, output treesize:64 [2021-07-09 18:15:47,681 INFO L446 ElimStorePlain]: Different costs {3=[v_C_93], 12=[A, B]} [2021-07-09 18:15:47,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:47,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:47,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:47,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 52 [2021-07-09 18:15:47,687 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:47,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:47,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:47,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:47,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:47,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:47,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:47,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 42 [2021-07-09 18:15:47,706 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:47,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:47,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:47,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:47,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:47,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:47,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:47,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 30 [2021-07-09 18:15:47,718 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:47,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:47,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:15:47,723 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:77, output treesize:25 [2021-07-09 18:15:47,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2021-07-09 18:15:47,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:47,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:47,815 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:15:47,815 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:11 [2021-07-09 18:15:47,837 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:47,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839104034] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:47,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:47,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-07-09 18:15:47,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686089499] [2021-07-09 18:15:47,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:15:47,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:47,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:15:47,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:15:47,838 INFO L87 Difference]: Start difference. First operand 87933 states and 316168 transitions. Second operand has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:49,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:15:49,511 INFO L93 Difference]: Finished difference Result 88594 states and 318112 transitions. [2021-07-09 18:15:49,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:15:49,511 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:15:49,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:15:49,866 INFO L225 Difference]: With dead ends: 88594 [2021-07-09 18:15:49,866 INFO L226 Difference]: Without dead ends: 88567 [2021-07-09 18:15:49,866 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 831.2ms TimeCoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:15:50,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88567 states. [2021-07-09 18:15:51,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88567 to 88083. [2021-07-09 18:15:51,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88083 states, 88082 states have (on average 3.594832088281374) internal successors, (316640), 88082 states have internal predecessors, (316640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:52,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88083 states to 88083 states and 316640 transitions. [2021-07-09 18:15:52,629 INFO L78 Accepts]: Start accepts. Automaton has 88083 states and 316640 transitions. Word has length 37 [2021-07-09 18:15:52,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:15:52,629 INFO L482 AbstractCegarLoop]: Abstraction has 88083 states and 316640 transitions. [2021-07-09 18:15:52,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:52,629 INFO L276 IsEmpty]: Start isEmpty. Operand 88083 states and 316640 transitions. [2021-07-09 18:15:52,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:15:52,764 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:15:52,765 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:15:52,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-07-09 18:15:52,965 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:15:52,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:15:52,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1709357799, now seen corresponding path program 75 times [2021-07-09 18:15:52,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:15:52,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648918966] [2021-07-09 18:15:52,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:15:52,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:53,324 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:53,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:53,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648918966] [2021-07-09 18:15:53,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648918966] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:53,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810287399] [2021-07-09 18:15:53,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:53,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:15:53,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:15:53,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-09 18:15:53,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:53,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-07-09 18:15:53,460 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:53,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:53,472 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:15:53,472 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:50 [2021-07-09 18:15:53,616 INFO L354 Elim1Store]: treesize reduction 29, result has 14.7 percent of original size [2021-07-09 18:15:53,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-07-09 18:15:53,617 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:53,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:53,633 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:15:53,633 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:71 [2021-07-09 18:15:53,826 INFO L446 ElimStorePlain]: Different costs {6=[v_C_96], 7=[A, B]} [2021-07-09 18:15:53,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:53,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:53,849 INFO L354 Elim1Store]: treesize reduction 53, result has 8.6 percent of original size [2021-07-09 18:15:53,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 55 treesize of output 63 [2021-07-09 18:15:53,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:53,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:53,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:53,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:53,907 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-07-09 18:15:53,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 66 treesize of output 76 [2021-07-09 18:15:53,913 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:53,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:53,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:53,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:53,954 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:53,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 77 [2021-07-09 18:15:54,234 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 18:15:54,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:54,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:15:54,253 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:93, output treesize:50 [2021-07-09 18:15:54,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:54,677 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:54,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 25 [2021-07-09 18:15:54,681 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:54,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:54,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:54,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:54,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:54,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:54,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:54,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:54,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 17 [2021-07-09 18:15:54,688 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:54,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:54,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:15:54,705 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:86, output treesize:28 [2021-07-09 18:15:54,762 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:54,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810287399] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:54,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:54,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 25 [2021-07-09 18:15:54,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949635622] [2021-07-09 18:15:54,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:15:54,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:54,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:15:54,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:15:54,764 INFO L87 Difference]: Start difference. First operand 88083 states and 316640 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:57,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:15:57,935 INFO L93 Difference]: Finished difference Result 89029 states and 319258 transitions. [2021-07-09 18:15:57,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:15:57,937 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:15:57,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:15:58,463 INFO L225 Difference]: With dead ends: 89029 [2021-07-09 18:15:58,463 INFO L226 Difference]: Without dead ends: 88853 [2021-07-09 18:15:58,463 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 18 SyntacticMatches, 6 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 2300.2ms TimeCoverageRelationStatistics Valid=235, Invalid=2117, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:15:58,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88853 states. [2021-07-09 18:16:00,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88853 to 88137. [2021-07-09 18:16:00,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88137 states, 88136 states have (on average 3.594399564309703) internal successors, (316796), 88136 states have internal predecessors, (316796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:00,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88137 states to 88137 states and 316796 transitions. [2021-07-09 18:16:00,971 INFO L78 Accepts]: Start accepts. Automaton has 88137 states and 316796 transitions. Word has length 37 [2021-07-09 18:16:00,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:00,971 INFO L482 AbstractCegarLoop]: Abstraction has 88137 states and 316796 transitions. [2021-07-09 18:16:00,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:00,971 INFO L276 IsEmpty]: Start isEmpty. Operand 88137 states and 316796 transitions. [2021-07-09 18:16:01,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:16:01,483 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:01,483 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:01,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-07-09 18:16:01,684 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:01,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:01,685 INFO L82 PathProgramCache]: Analyzing trace with hash -526131645, now seen corresponding path program 76 times [2021-07-09 18:16:01,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:01,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191164647] [2021-07-09 18:16:01,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:01,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:01,980 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:01,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:01,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191164647] [2021-07-09 18:16:01,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191164647] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:01,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591811117] [2021-07-09 18:16:01,981 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:02,010 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:16:02,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:16:02,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:16:02,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:02,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-07-09 18:16:02,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:02,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:02,111 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:16:02,111 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-07-09 18:16:02,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:02,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2021-07-09 18:16:02,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:02,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:02,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:16:02,224 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:75, output treesize:74 [2021-07-09 18:16:02,266 INFO L446 ElimStorePlain]: Different costs {3=[v_C_99], 12=[A, B]} [2021-07-09 18:16:02,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:02,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:02,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:02,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 55 [2021-07-09 18:16:02,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:02,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:02,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:02,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:02,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:16:02,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:02,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:16:02,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 51 [2021-07-09 18:16:02,291 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:02,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:02,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:02,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:02,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:16:02,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:02,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:16:02,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-07-09 18:16:02,304 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:02,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:02,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:16:02,309 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:81, output treesize:25 [2021-07-09 18:16:02,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2021-07-09 18:16:02,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:02,366 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:02,367 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:16:02,367 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-07-09 18:16:02,383 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:02,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591811117] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:02,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:02,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-07-09 18:16:02,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740180531] [2021-07-09 18:16:02,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:16:02,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:02,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:16:02,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:16:02,384 INFO L87 Difference]: Start difference. First operand 88137 states and 316796 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:03,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:03,787 INFO L93 Difference]: Finished difference Result 88467 states and 317720 transitions. [2021-07-09 18:16:03,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:16:03,787 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:16:03,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:04,373 INFO L225 Difference]: With dead ends: 88467 [2021-07-09 18:16:04,373 INFO L226 Difference]: Without dead ends: 88326 [2021-07-09 18:16:04,373 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 496.6ms TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:16:04,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88326 states. [2021-07-09 18:16:06,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88326 to 88107. [2021-07-09 18:16:06,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88107 states, 88106 states have (on average 3.594670056522825) internal successors, (316712), 88106 states have internal predecessors, (316712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:06,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88107 states to 88107 states and 316712 transitions. [2021-07-09 18:16:06,866 INFO L78 Accepts]: Start accepts. Automaton has 88107 states and 316712 transitions. Word has length 37 [2021-07-09 18:16:06,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:06,866 INFO L482 AbstractCegarLoop]: Abstraction has 88107 states and 316712 transitions. [2021-07-09 18:16:06,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:06,867 INFO L276 IsEmpty]: Start isEmpty. Operand 88107 states and 316712 transitions. [2021-07-09 18:16:07,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:16:07,000 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:07,000 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:07,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-07-09 18:16:07,201 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:07,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:07,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1749520249, now seen corresponding path program 77 times [2021-07-09 18:16:07,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:07,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675634349] [2021-07-09 18:16:07,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:07,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:07,574 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:07,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:07,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675634349] [2021-07-09 18:16:07,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675634349] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:07,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933553105] [2021-07-09 18:16:07,575 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:07,609 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:16:07,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:16:07,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 18:16:07,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:07,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-07-09 18:16:07,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:07,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:07,697 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:16:07,697 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:53 [2021-07-09 18:16:07,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:07,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2021-07-09 18:16:07,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:07,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:07,808 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:16:07,808 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:72, output treesize:67 [2021-07-09 18:16:07,930 INFO L446 ElimStorePlain]: Different costs {3=[v_C_102], 12=[A, B]} [2021-07-09 18:16:07,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:07,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:07,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:07,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 58 [2021-07-09 18:16:07,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:07,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:07,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:07,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:07,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:07,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:16:07,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:07,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:16:07,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 58 [2021-07-09 18:16:07,960 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:07,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:07,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:07,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:07,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:07,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:16:07,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:07,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:16:07,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2021-07-09 18:16:07,979 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:07,984 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:07,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:16:07,985 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:88, output treesize:26 [2021-07-09 18:16:08,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2021-07-09 18:16:08,308 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2021-07-09 18:16:08,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:08,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:08,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:16:08,311 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:5 [2021-07-09 18:16:08,330 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:08,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933553105] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:08,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:08,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-07-09 18:16:08,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696233179] [2021-07-09 18:16:08,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:16:08,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:08,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:16:08,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:16:08,331 INFO L87 Difference]: Start difference. First operand 88107 states and 316712 transitions. Second operand has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:09,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:09,535 INFO L93 Difference]: Finished difference Result 88596 states and 318077 transitions. [2021-07-09 18:16:09,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:16:09,536 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:16:09,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:09,875 INFO L225 Difference]: With dead ends: 88596 [2021-07-09 18:16:09,876 INFO L226 Difference]: Without dead ends: 88422 [2021-07-09 18:16:09,876 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 706.1ms TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:16:09,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88422 states. [2021-07-09 18:16:11,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88422 to 88155. [2021-07-09 18:16:11,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88155 states, 88154 states have (on average 3.594346257685414) internal successors, (316856), 88154 states have internal predecessors, (316856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:12,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88155 states to 88155 states and 316856 transitions. [2021-07-09 18:16:12,223 INFO L78 Accepts]: Start accepts. Automaton has 88155 states and 316856 transitions. Word has length 37 [2021-07-09 18:16:12,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:12,223 INFO L482 AbstractCegarLoop]: Abstraction has 88155 states and 316856 transitions. [2021-07-09 18:16:12,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:12,224 INFO L276 IsEmpty]: Start isEmpty. Operand 88155 states and 316856 transitions. [2021-07-09 18:16:12,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:16:12,335 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:12,335 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:12,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-07-09 18:16:12,535 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:12,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:12,536 INFO L82 PathProgramCache]: Analyzing trace with hash -395343355, now seen corresponding path program 78 times [2021-07-09 18:16:12,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:12,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369777994] [2021-07-09 18:16:12,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:12,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:13,349 WARN L205 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2021-07-09 18:16:13,546 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:13,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:13,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369777994] [2021-07-09 18:16:13,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369777994] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:13,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071568486] [2021-07-09 18:16:13,546 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:13,578 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 18:16:13,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:16:13,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 52 conjunts are in the unsatisfiable core [2021-07-09 18:16:13,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:13,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-07-09 18:16:13,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:13,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:13,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:16:13,687 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:59, output treesize:58 [2021-07-09 18:16:13,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:13,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2021-07-09 18:16:13,763 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:13,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:13,780 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:16:13,780 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:77, output treesize:72 [2021-07-09 18:16:13,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 50 [2021-07-09 18:16:13,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:13,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:13,971 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:16:13,971 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:82, output treesize:81 [2021-07-09 18:16:14,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 39 [2021-07-09 18:16:14,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:14,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:14,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:16:14,040 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:81, output treesize:54 [2021-07-09 18:16:14,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-07-09 18:16:14,089 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:14,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:14,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2021-07-09 18:16:14,098 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:14,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:14,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:16:14,102 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:52, output treesize:12 [2021-07-09 18:16:14,149 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:14,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071568486] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:14,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:14,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 18:16:14,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972880300] [2021-07-09 18:16:14,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:16:14,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:14,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:16:14,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:16:14,151 INFO L87 Difference]: Start difference. First operand 88155 states and 316856 transitions. Second operand has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:14,992 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 43 [2021-07-09 18:16:17,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:17,710 INFO L93 Difference]: Finished difference Result 135959 states and 484747 transitions. [2021-07-09 18:16:17,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 18:16:17,718 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:16:17,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:18,329 INFO L225 Difference]: With dead ends: 135959 [2021-07-09 18:16:18,329 INFO L226 Difference]: Without dead ends: 135910 [2021-07-09 18:16:18,329 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 2680.7ms TimeCoverageRelationStatistics Valid=380, Invalid=2376, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 18:16:18,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135910 states. [2021-07-09 18:16:20,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135910 to 88218. [2021-07-09 18:16:20,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88218 states, 88217 states have (on average 3.594057834657719) internal successors, (317057), 88217 states have internal predecessors, (317057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:21,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88218 states to 88218 states and 317057 transitions. [2021-07-09 18:16:21,400 INFO L78 Accepts]: Start accepts. Automaton has 88218 states and 317057 transitions. Word has length 37 [2021-07-09 18:16:21,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:21,400 INFO L482 AbstractCegarLoop]: Abstraction has 88218 states and 317057 transitions. [2021-07-09 18:16:21,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:21,400 INFO L276 IsEmpty]: Start isEmpty. Operand 88218 states and 317057 transitions. [2021-07-09 18:16:21,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:16:21,536 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:21,536 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:21,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:21,741 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:21,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:21,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1514138647, now seen corresponding path program 79 times [2021-07-09 18:16:21,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:21,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287009827] [2021-07-09 18:16:21,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:21,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:22,242 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:22,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:22,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287009827] [2021-07-09 18:16:22,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287009827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:22,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48394943] [2021-07-09 18:16:22,242 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:22,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:22,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:16:22,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:22,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-07-09 18:16:22,387 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:22,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:22,400 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:16:22,400 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:53, output treesize:52 [2021-07-09 18:16:22,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:22,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 45 [2021-07-09 18:16:22,479 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:22,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:22,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:16:22,495 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:88, output treesize:87 [2021-07-09 18:16:22,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:22,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:22,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:22,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 60 [2021-07-09 18:16:22,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:22,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:22,608 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:16:22,608 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:101, output treesize:114 [2021-07-09 18:16:22,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 46 [2021-07-09 18:16:22,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:22,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:22,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-07-09 18:16:22,677 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:22,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:22,682 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:16:22,683 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:77, output treesize:22 [2021-07-09 18:16:22,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2021-07-09 18:16:22,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:22,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:22,715 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:16:22,715 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:5 [2021-07-09 18:16:22,741 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:22,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48394943] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:22,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:22,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2021-07-09 18:16:22,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60031839] [2021-07-09 18:16:22,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:16:22,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:22,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:16:22,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:16:22,742 INFO L87 Difference]: Start difference. First operand 88218 states and 317057 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:26,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:26,318 INFO L93 Difference]: Finished difference Result 137039 states and 488238 transitions. [2021-07-09 18:16:26,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:16:26,319 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:16:26,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:26,910 INFO L225 Difference]: With dead ends: 137039 [2021-07-09 18:16:26,910 INFO L226 Difference]: Without dead ends: 136886 [2021-07-09 18:16:26,910 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 1912.9ms TimeCoverageRelationStatistics Valid=407, Invalid=2043, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:16:27,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136886 states. [2021-07-09 18:16:29,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136886 to 88221. [2021-07-09 18:16:29,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88221 states, 88220 states have (on average 3.593901609612333) internal successors, (317054), 88220 states have internal predecessors, (317054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:29,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88221 states to 88221 states and 317054 transitions. [2021-07-09 18:16:29,872 INFO L78 Accepts]: Start accepts. Automaton has 88221 states and 317054 transitions. Word has length 37 [2021-07-09 18:16:29,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:29,872 INFO L482 AbstractCegarLoop]: Abstraction has 88221 states and 317054 transitions. [2021-07-09 18:16:29,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:29,872 INFO L276 IsEmpty]: Start isEmpty. Operand 88221 states and 317054 transitions. [2021-07-09 18:16:29,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:16:29,981 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:29,981 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:30,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:30,182 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:30,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:30,182 INFO L82 PathProgramCache]: Analyzing trace with hash -759209629, now seen corresponding path program 80 times [2021-07-09 18:16:30,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:30,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109628867] [2021-07-09 18:16:30,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:30,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:30,556 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:30,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:30,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109628867] [2021-07-09 18:16:30,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109628867] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:30,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220189765] [2021-07-09 18:16:30,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:30,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:16:30,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:16:30,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 18:16:30,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:31,010 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2021-07-09 18:16:31,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-07-09 18:16:31,047 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:31,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:31,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:16:31,061 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:53 [2021-07-09 18:16:31,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:16:31,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:31,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 41 [2021-07-09 18:16:31,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:31,163 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:31,164 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:16:31,164 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:71, output treesize:78 [2021-07-09 18:16:31,332 INFO L446 ElimStorePlain]: Different costs {0=[v_C_111], 3=[A, B]} [2021-07-09 18:16:31,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 50 [2021-07-09 18:16:31,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:31,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:31,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:31,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:31,362 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:31,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 52 [2021-07-09 18:16:31,363 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:31,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:31,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:31,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:31,383 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:31,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 31 [2021-07-09 18:16:31,386 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:16:31,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:31,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:16:31,397 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:80, output treesize:34 [2021-07-09 18:16:31,487 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:31,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 39 [2021-07-09 18:16:31,492 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:16:31,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:31,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:31,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2021-07-09 18:16:31,498 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:31,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:31,518 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:16:31,518 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:29 [2021-07-09 18:16:31,583 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:31,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220189765] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:31,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:31,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-09 18:16:31,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935147061] [2021-07-09 18:16:31,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:16:31,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:31,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:16:31,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:16:31,585 INFO L87 Difference]: Start difference. First operand 88221 states and 317054 transitions. Second operand has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:33,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:33,887 INFO L93 Difference]: Finished difference Result 89369 states and 320372 transitions. [2021-07-09 18:16:33,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:16:33,887 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:16:33,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:34,242 INFO L225 Difference]: With dead ends: 89369 [2021-07-09 18:16:34,242 INFO L226 Difference]: Without dead ends: 89195 [2021-07-09 18:16:34,242 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 1669.6ms TimeCoverageRelationStatistics Valid=146, Invalid=1186, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:16:34,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89195 states. [2021-07-09 18:16:35,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89195 to 88245. [2021-07-09 18:16:35,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88245 states, 88244 states have (on average 3.593672091020353) internal successors, (317120), 88244 states have internal predecessors, (317120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:36,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88245 states to 88245 states and 317120 transitions. [2021-07-09 18:16:36,662 INFO L78 Accepts]: Start accepts. Automaton has 88245 states and 317120 transitions. Word has length 37 [2021-07-09 18:16:36,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:36,663 INFO L482 AbstractCegarLoop]: Abstraction has 88245 states and 317120 transitions. [2021-07-09 18:16:36,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:36,663 INFO L276 IsEmpty]: Start isEmpty. Operand 88245 states and 317120 transitions. [2021-07-09 18:16:36,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:16:36,791 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:36,791 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:36,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2021-07-09 18:16:36,993 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:36,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:36,993 INFO L82 PathProgramCache]: Analyzing trace with hash 960803363, now seen corresponding path program 81 times [2021-07-09 18:16:36,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:36,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178586472] [2021-07-09 18:16:36,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:36,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:37,303 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:37,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:37,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178586472] [2021-07-09 18:16:37,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178586472] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:37,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078351017] [2021-07-09 18:16:37,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:37,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:16:37,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:16:37,337 WARN L261 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-09 18:16:37,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:37,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-07-09 18:16:37,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:37,440 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:37,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:16:37,441 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:50 [2021-07-09 18:16:37,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2021-07-09 18:16:37,515 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:37,895 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-07-09 18:16:37,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:37,896 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:16:37,896 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:53, output treesize:56 [2021-07-09 18:16:38,103 INFO L446 ElimStorePlain]: Different costs {0=[v_C_114], 3=[A, B]} [2021-07-09 18:16:38,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 40 [2021-07-09 18:16:38,107 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:38,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:38,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:38,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:38,137 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:38,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 49 [2021-07-09 18:16:38,138 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:38,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:38,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:38,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:38,159 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:38,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 34 [2021-07-09 18:16:38,161 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 18:16:38,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:38,174 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:16:38,174 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:82, output treesize:31 [2021-07-09 18:16:38,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:38,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:38,355 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:38,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 59 [2021-07-09 18:16:38,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 18:16:38,418 INFO L628 ElimStorePlain]: treesize reduction 81, result has 23.6 percent of original size [2021-07-09 18:16:38,421 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:16:38,421 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:37 [2021-07-09 18:16:38,487 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:38,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078351017] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:38,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:38,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 26 [2021-07-09 18:16:38,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833612298] [2021-07-09 18:16:38,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:16:38,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:38,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:16:38,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=640, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:16:38,488 INFO L87 Difference]: Start difference. First operand 88245 states and 317120 transitions. Second operand has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:41,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:41,021 INFO L93 Difference]: Finished difference Result 88833 states and 318722 transitions. [2021-07-09 18:16:41,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:16:41,022 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:16:41,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:41,358 INFO L225 Difference]: With dead ends: 88833 [2021-07-09 18:16:41,358 INFO L226 Difference]: Without dead ends: 88590 [2021-07-09 18:16:41,359 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 1404.9ms TimeCoverageRelationStatistics Valid=144, Invalid=1578, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:16:41,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88590 states. [2021-07-09 18:16:43,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88590 to 88221. [2021-07-09 18:16:43,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88221 states, 88220 states have (on average 3.593901609612333) internal successors, (317054), 88220 states have internal predecessors, (317054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:44,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88221 states to 88221 states and 317054 transitions. [2021-07-09 18:16:44,286 INFO L78 Accepts]: Start accepts. Automaton has 88221 states and 317054 transitions. Word has length 37 [2021-07-09 18:16:44,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:44,286 INFO L482 AbstractCegarLoop]: Abstraction has 88221 states and 317054 transitions. [2021-07-09 18:16:44,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:44,287 INFO L276 IsEmpty]: Start isEmpty. Operand 88221 states and 317054 transitions. [2021-07-09 18:16:44,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:16:44,434 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:44,434 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:44,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:44,649 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:44,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:44,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1764133243, now seen corresponding path program 82 times [2021-07-09 18:16:44,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:44,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37769085] [2021-07-09 18:16:44,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:44,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:45,090 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:45,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:45,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37769085] [2021-07-09 18:16:45,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37769085] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:45,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686679804] [2021-07-09 18:16:45,091 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:45,122 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:16:45,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:16:45,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:16:45,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:45,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-07-09 18:16:45,214 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:45,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:45,226 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:16:45,226 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:69, output treesize:68 [2021-07-09 18:16:45,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:45,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 45 [2021-07-09 18:16:45,669 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:45,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:45,690 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:16:45,690 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:90, output treesize:94 [2021-07-09 18:16:45,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:45,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:45,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:45,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 52 [2021-07-09 18:16:45,758 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:45,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:45,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:16:45,779 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:103, output treesize:102 [2021-07-09 18:16:45,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:45,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:45,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:45,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 54 [2021-07-09 18:16:45,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:45,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:45,930 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:16:45,930 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:105, output treesize:68 [2021-07-09 18:16:45,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-07-09 18:16:45,975 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:45,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:45,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2021-07-09 18:16:45,981 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:45,983 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:45,983 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:16:45,983 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:46, output treesize:7 [2021-07-09 18:16:46,005 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:46,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686679804] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:46,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:46,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2021-07-09 18:16:46,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743843120] [2021-07-09 18:16:46,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:16:46,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:46,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:16:46,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:16:46,007 INFO L87 Difference]: Start difference. First operand 88221 states and 317054 transitions. Second operand has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:49,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:49,287 INFO L93 Difference]: Finished difference Result 135851 states and 484413 transitions. [2021-07-09 18:16:49,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:16:49,288 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:16:49,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:50,196 INFO L225 Difference]: With dead ends: 135851 [2021-07-09 18:16:50,197 INFO L226 Difference]: Without dead ends: 135799 [2021-07-09 18:16:50,197 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 2274.3ms TimeCoverageRelationStatistics Valid=311, Invalid=2139, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:16:50,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135799 states. [2021-07-09 18:16:52,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135799 to 88287. [2021-07-09 18:16:52,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88287 states, 88286 states have (on average 3.593559567768389) internal successors, (317261), 88286 states have internal predecessors, (317261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:52,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88287 states to 88287 states and 317261 transitions. [2021-07-09 18:16:52,924 INFO L78 Accepts]: Start accepts. Automaton has 88287 states and 317261 transitions. Word has length 37 [2021-07-09 18:16:52,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:52,924 INFO L482 AbstractCegarLoop]: Abstraction has 88287 states and 317261 transitions. [2021-07-09 18:16:52,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:52,924 INFO L276 IsEmpty]: Start isEmpty. Operand 88287 states and 317261 transitions. [2021-07-09 18:16:53,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:16:53,038 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:53,038 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:53,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2021-07-09 18:16:53,239 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:53,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:53,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1412038761, now seen corresponding path program 83 times [2021-07-09 18:16:53,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:53,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722397664] [2021-07-09 18:16:53,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:53,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:54,286 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:54,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:54,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722397664] [2021-07-09 18:16:54,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722397664] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:54,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968531239] [2021-07-09 18:16:54,287 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:54,320 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 18:16:54,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:16:54,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 18:16:54,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:54,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-07-09 18:16:54,408 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:54,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:54,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:16:54,420 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:53, output treesize:52 [2021-07-09 18:16:54,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:54,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:54,537 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-09 18:16:54,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 52 [2021-07-09 18:16:54,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:54,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:54,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:16:54,555 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:91, output treesize:90 [2021-07-09 18:16:54,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:54,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:54,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:54,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:54,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:54,707 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-09 18:16:54,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 66 [2021-07-09 18:16:54,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:54,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:54,726 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:16:54,726 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:99, output treesize:98 [2021-07-09 18:16:54,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-07-09 18:16:54,853 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:54,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:54,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2021-07-09 18:16:54,870 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:54,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:54,880 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:16:54,880 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:77, output treesize:34 [2021-07-09 18:16:54,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:54,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:54,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:54,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:54,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:54,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:54,953 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:54,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 69 [2021-07-09 18:16:54,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:16:54,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:54,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:16:54,987 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:21 [2021-07-09 18:16:55,046 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:55,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968531239] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:55,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:55,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-07-09 18:16:55,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257865812] [2021-07-09 18:16:55,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:16:55,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:55,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:16:55,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:16:55,047 INFO L87 Difference]: Start difference. First operand 88287 states and 317261 transitions. Second operand has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:57,378 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 62 [2021-07-09 18:16:59,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:59,905 INFO L93 Difference]: Finished difference Result 136799 states and 487203 transitions. [2021-07-09 18:16:59,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 18:16:59,905 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:16:59,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:00,867 INFO L225 Difference]: With dead ends: 136799 [2021-07-09 18:17:00,867 INFO L226 Difference]: Without dead ends: 136619 [2021-07-09 18:17:00,867 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 871 ImplicationChecksByTransitivity, 3411.8ms TimeCoverageRelationStatistics Valid=623, Invalid=3409, Unknown=0, NotChecked=0, Total=4032 [2021-07-09 18:17:01,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136619 states. [2021-07-09 18:17:03,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136619 to 88272. [2021-07-09 18:17:03,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88272 states, 88271 states have (on average 3.593762390819182) internal successors, (317225), 88271 states have internal predecessors, (317225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:04,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88272 states to 88272 states and 317225 transitions. [2021-07-09 18:17:04,164 INFO L78 Accepts]: Start accepts. Automaton has 88272 states and 317225 transitions. Word has length 37 [2021-07-09 18:17:04,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:04,165 INFO L482 AbstractCegarLoop]: Abstraction has 88272 states and 317225 transitions. [2021-07-09 18:17:04,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:04,165 INFO L276 IsEmpty]: Start isEmpty. Operand 88272 states and 317225 transitions. [2021-07-09 18:17:04,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:17:04,298 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:04,298 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:04,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-07-09 18:17:04,498 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:04,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:04,499 INFO L82 PathProgramCache]: Analyzing trace with hash -537673117, now seen corresponding path program 84 times [2021-07-09 18:17:04,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:04,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31136112] [2021-07-09 18:17:04,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:04,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:05,100 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:05,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:05,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31136112] [2021-07-09 18:17:05,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31136112] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:05,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647623996] [2021-07-09 18:17:05,100 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:05,135 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:17:05,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:05,136 WARN L261 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-09 18:17:05,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:05,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-07-09 18:17:05,205 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:05,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:05,217 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:17:05,217 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:50 [2021-07-09 18:17:05,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:05,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:05,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2021-07-09 18:17:05,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:05,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:05,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:17:05,307 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:75, output treesize:70 [2021-07-09 18:17:05,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:05,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:05,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:05,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-07-09 18:17:05,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:05,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:05,451 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:17:05,451 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:79, output treesize:78 [2021-07-09 18:17:05,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:05,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:05,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:05,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:05,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:05,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-07-09 18:17:05,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:05,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:05,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:05,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:05,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:05,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:05,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:05,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 26 [2021-07-09 18:17:05,528 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:05,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:05,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:17:05,539 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:84, output treesize:33 [2021-07-09 18:17:05,634 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:05,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 39 [2021-07-09 18:17:05,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:17:05,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:05,653 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:17:05,653 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:24 [2021-07-09 18:17:05,964 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-07-09 18:17:05,968 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:05,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647623996] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:05,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:05,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2021-07-09 18:17:05,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815104836] [2021-07-09 18:17:05,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:17:05,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:05,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:17:05,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:17:05,969 INFO L87 Difference]: Start difference. First operand 88272 states and 317225 transitions. Second operand has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:07,924 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 59 [2021-07-09 18:17:10,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:10,556 INFO L93 Difference]: Finished difference Result 136510 states and 486320 transitions. [2021-07-09 18:17:10,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 18:17:10,557 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:17:10,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:11,211 INFO L225 Difference]: With dead ends: 136510 [2021-07-09 18:17:11,211 INFO L226 Difference]: Without dead ends: 136258 [2021-07-09 18:17:11,211 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 3025.2ms TimeCoverageRelationStatistics Valid=494, Invalid=2812, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:17:11,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136258 states. [2021-07-09 18:17:13,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136258 to 88339. [2021-07-09 18:17:13,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88339 states, 88338 states have (on average 3.593278090968779) internal successors, (317423), 88338 states have internal predecessors, (317423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:14,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88339 states to 88339 states and 317423 transitions. [2021-07-09 18:17:14,439 INFO L78 Accepts]: Start accepts. Automaton has 88339 states and 317423 transitions. Word has length 37 [2021-07-09 18:17:14,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:14,440 INFO L482 AbstractCegarLoop]: Abstraction has 88339 states and 317423 transitions. [2021-07-09 18:17:14,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:14,440 INFO L276 IsEmpty]: Start isEmpty. Operand 88339 states and 317423 transitions. [2021-07-09 18:17:14,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:17:14,568 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:14,568 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:14,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-07-09 18:17:14,769 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:14,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:14,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1445860719, now seen corresponding path program 85 times [2021-07-09 18:17:14,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:14,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028414340] [2021-07-09 18:17:14,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:14,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:15,048 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:15,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:15,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028414340] [2021-07-09 18:17:15,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028414340] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:15,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034038626] [2021-07-09 18:17:15,048 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:15,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:15,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:17:15,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:15,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-07-09 18:17:15,143 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:15,155 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:15,155 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:17:15,156 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:50 [2021-07-09 18:17:15,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:15,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:15,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 41 [2021-07-09 18:17:15,256 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:15,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:15,269 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:17:15,269 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:71, output treesize:78 [2021-07-09 18:17:15,351 INFO L446 ElimStorePlain]: Different costs {0=[A, B], 3=[v_C_126]} [2021-07-09 18:17:15,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 47 [2021-07-09 18:17:15,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:15,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:15,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2021-07-09 18:17:15,364 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:15,369 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:15,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:15,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:15,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 28 [2021-07-09 18:17:15,373 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:15,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:15,378 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:17:15,378 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:76, output treesize:24 [2021-07-09 18:17:15,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2021-07-09 18:17:15,411 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:15,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:15,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:17:15,412 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:5 [2021-07-09 18:17:15,429 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:15,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034038626] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:15,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:15,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-07-09 18:17:15,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486090527] [2021-07-09 18:17:15,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:17:15,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:15,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:17:15,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:17:15,431 INFO L87 Difference]: Start difference. First operand 88339 states and 317423 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:16,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:16,704 INFO L93 Difference]: Finished difference Result 88738 states and 318546 transitions. [2021-07-09 18:17:16,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:17:16,705 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:17:16,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:17,323 INFO L225 Difference]: With dead ends: 88738 [2021-07-09 18:17:17,323 INFO L226 Difference]: Without dead ends: 88653 [2021-07-09 18:17:17,323 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 492.2ms TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:17:17,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88653 states. [2021-07-09 18:17:19,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88653 to 88413. [2021-07-09 18:17:19,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88413 states, 88412 states have (on average 3.592623173324888) internal successors, (317631), 88412 states have internal predecessors, (317631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:19,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88413 states to 88413 states and 317631 transitions. [2021-07-09 18:17:19,912 INFO L78 Accepts]: Start accepts. Automaton has 88413 states and 317631 transitions. Word has length 37 [2021-07-09 18:17:19,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:19,912 INFO L482 AbstractCegarLoop]: Abstraction has 88413 states and 317631 transitions. [2021-07-09 18:17:19,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:19,912 INFO L276 IsEmpty]: Start isEmpty. Operand 88413 states and 317631 transitions. [2021-07-09 18:17:20,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:17:20,030 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:20,030 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:20,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-07-09 18:17:20,231 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:20,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:20,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1665880423, now seen corresponding path program 86 times [2021-07-09 18:17:20,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:20,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257694102] [2021-07-09 18:17:20,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:20,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:20,537 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:20,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:20,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257694102] [2021-07-09 18:17:20,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257694102] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:20,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972846521] [2021-07-09 18:17:20,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:20,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:17:20,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:20,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 18:17:20,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:20,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-07-09 18:17:20,660 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:20,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:20,673 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:17:20,673 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:53 [2021-07-09 18:17:21,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:21,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2021-07-09 18:17:21,123 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:21,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:21,137 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:17:21,137 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:72, output treesize:71 [2021-07-09 18:17:21,183 INFO L446 ElimStorePlain]: Different costs {3=[v_C_129], 12=[A, B]} [2021-07-09 18:17:21,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:21,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:21,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:21,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 55 [2021-07-09 18:17:21,189 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:21,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:21,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:21,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:21,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:21,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:21,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:21,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-07-09 18:17:21,213 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:21,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:21,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:21,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:21,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:21,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:21,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:21,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 26 [2021-07-09 18:17:21,227 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:21,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:21,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:17:21,234 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:84, output treesize:28 [2021-07-09 18:17:21,312 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:21,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 39 [2021-07-09 18:17:21,317 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 18:17:21,337 INFO L628 ElimStorePlain]: treesize reduction 39, result has 36.1 percent of original size [2021-07-09 18:17:21,340 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:17:21,340 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:21 [2021-07-09 18:17:21,395 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:21,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972846521] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:21,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:21,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-09 18:17:21,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343095421] [2021-07-09 18:17:21,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:17:21,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:21,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:17:21,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:17:21,396 INFO L87 Difference]: Start difference. First operand 88413 states and 317631 transitions. Second operand has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:22,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:22,952 INFO L93 Difference]: Finished difference Result 89892 states and 321912 transitions. [2021-07-09 18:17:22,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:17:22,952 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:17:22,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:23,277 INFO L225 Difference]: With dead ends: 89892 [2021-07-09 18:17:23,278 INFO L226 Difference]: Without dead ends: 89614 [2021-07-09 18:17:23,278 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1095.7ms TimeCoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:17:23,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89614 states. [2021-07-09 18:17:25,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89614 to 88392. [2021-07-09 18:17:25,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88392 states, 88391 states have (on average 3.592763969182383) internal successors, (317568), 88391 states have internal predecessors, (317568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:25,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88392 states to 88392 states and 317568 transitions. [2021-07-09 18:17:25,879 INFO L78 Accepts]: Start accepts. Automaton has 88392 states and 317568 transitions. Word has length 37 [2021-07-09 18:17:25,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:25,879 INFO L482 AbstractCegarLoop]: Abstraction has 88392 states and 317568 transitions. [2021-07-09 18:17:25,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:25,879 INFO L276 IsEmpty]: Start isEmpty. Operand 88392 states and 317568 transitions. [2021-07-09 18:17:26,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:17:26,010 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:26,010 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:26,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:26,210 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:26,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:26,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1598291623, now seen corresponding path program 87 times [2021-07-09 18:17:26,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:26,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146141312] [2021-07-09 18:17:26,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:26,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:26,492 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:26,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:26,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146141312] [2021-07-09 18:17:26,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146141312] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:26,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164161764] [2021-07-09 18:17:26,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:26,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:17:26,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:26,529 WARN L261 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-09 18:17:26,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:26,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-07-09 18:17:26,623 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:26,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:26,635 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:17:26,635 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:50 [2021-07-09 18:17:26,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:26,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-07-09 18:17:26,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:26,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:26,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:17:26,799 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:73, output treesize:72 [2021-07-09 18:17:27,310 INFO L446 ElimStorePlain]: Different costs {0=[v_C_132], 3=[A, B]} [2021-07-09 18:17:27,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 45 [2021-07-09 18:17:27,314 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:27,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:27,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:27,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:27,343 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:27,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 52 [2021-07-09 18:17:27,345 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:27,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:27,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:27,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:27,368 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:27,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 36 [2021-07-09 18:17:27,370 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-09 18:17:27,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:27,384 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:17:27,384 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:85, output treesize:40 [2021-07-09 18:17:27,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-07-09 18:17:27,482 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:27,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2021-07-09 18:17:27,485 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:27,502 INFO L628 ElimStorePlain]: treesize reduction 3, result has 87.0 percent of original size [2021-07-09 18:17:27,503 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:17:27,503 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:56, output treesize:20 [2021-07-09 18:17:27,559 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:27,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164161764] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:27,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:27,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 25 [2021-07-09 18:17:27,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344613382] [2021-07-09 18:17:27,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:17:27,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:27,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:17:27,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=590, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:17:27,560 INFO L87 Difference]: Start difference. First operand 88392 states and 317568 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:29,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:29,538 INFO L93 Difference]: Finished difference Result 88970 states and 319148 transitions. [2021-07-09 18:17:29,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:17:29,538 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:17:29,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:30,153 INFO L225 Difference]: With dead ends: 88970 [2021-07-09 18:17:30,153 INFO L226 Difference]: Without dead ends: 88806 [2021-07-09 18:17:30,153 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1463.4ms TimeCoverageRelationStatistics Valid=113, Invalid=1219, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:17:30,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88806 states. [2021-07-09 18:17:32,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88806 to 88450. [2021-07-09 18:17:32,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88450 states, 88449 states have (on average 3.5923074314011463) internal successors, (317736), 88449 states have internal predecessors, (317736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:33,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88450 states to 88450 states and 317736 transitions. [2021-07-09 18:17:33,193 INFO L78 Accepts]: Start accepts. Automaton has 88450 states and 317736 transitions. Word has length 37 [2021-07-09 18:17:33,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:33,193 INFO L482 AbstractCegarLoop]: Abstraction has 88450 states and 317736 transitions. [2021-07-09 18:17:33,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:33,193 INFO L276 IsEmpty]: Start isEmpty. Operand 88450 states and 317736 transitions. [2021-07-09 18:17:33,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:17:33,310 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:33,310 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:33,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:33,510 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:33,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:33,511 INFO L82 PathProgramCache]: Analyzing trace with hash -415065469, now seen corresponding path program 88 times [2021-07-09 18:17:33,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:33,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823961799] [2021-07-09 18:17:33,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:33,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:33,813 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:33,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:33,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823961799] [2021-07-09 18:17:33,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823961799] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:33,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515519175] [2021-07-09 18:17:33,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:33,843 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:17:33,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:33,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:17:33,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:33,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-07-09 18:17:33,912 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:33,922 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:33,923 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:17:33,923 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-07-09 18:17:33,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:33,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-07-09 18:17:33,994 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:34,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:34,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:17:34,007 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:65, output treesize:64 [2021-07-09 18:17:34,084 INFO L446 ElimStorePlain]: Different costs {3=[v_C_135], 12=[A, B]} [2021-07-09 18:17:34,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:34,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:34,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:34,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 55 [2021-07-09 18:17:34,089 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:34,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:34,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:34,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:34,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:34,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:34,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:34,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-07-09 18:17:34,108 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:34,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:34,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:34,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:34,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:34,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:34,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:34,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 26 [2021-07-09 18:17:34,121 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:34,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:34,126 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:17:34,126 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:81, output treesize:25 [2021-07-09 18:17:34,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2021-07-09 18:17:34,182 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:34,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:34,183 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:17:34,183 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-07-09 18:17:34,201 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:34,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515519175] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:34,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:34,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-07-09 18:17:34,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90087060] [2021-07-09 18:17:34,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:17:34,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:34,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:17:34,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:17:34,202 INFO L87 Difference]: Start difference. First operand 88450 states and 317736 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:35,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:35,405 INFO L93 Difference]: Finished difference Result 88887 states and 318958 transitions. [2021-07-09 18:17:35,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:17:35,406 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:17:35,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:36,019 INFO L225 Difference]: With dead ends: 88887 [2021-07-09 18:17:36,019 INFO L226 Difference]: Without dead ends: 88760 [2021-07-09 18:17:36,020 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 508.4ms TimeCoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:17:36,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88760 states. [2021-07-09 18:17:37,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88760 to 88432. [2021-07-09 18:17:37,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88432 states, 88431 states have (on average 3.592427994707738) internal successors, (317682), 88431 states have internal predecessors, (317682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:38,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88432 states to 88432 states and 317682 transitions. [2021-07-09 18:17:38,416 INFO L78 Accepts]: Start accepts. Automaton has 88432 states and 317682 transitions. Word has length 37 [2021-07-09 18:17:38,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:38,417 INFO L482 AbstractCegarLoop]: Abstraction has 88432 states and 317682 transitions. [2021-07-09 18:17:38,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:38,417 INFO L276 IsEmpty]: Start isEmpty. Operand 88432 states and 317682 transitions. [2021-07-09 18:17:38,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:17:38,530 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:38,530 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:38,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2021-07-09 18:17:38,752 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:38,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:38,752 INFO L82 PathProgramCache]: Analyzing trace with hash 2137898311, now seen corresponding path program 89 times [2021-07-09 18:17:38,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:38,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527612233] [2021-07-09 18:17:38,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:38,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:39,026 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:39,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:39,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527612233] [2021-07-09 18:17:39,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527612233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:39,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162480324] [2021-07-09 18:17:39,027 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:39,056 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:17:39,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:39,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 18:17:39,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:39,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-07-09 18:17:39,149 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:39,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:39,163 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:17:39,163 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:56, output treesize:55 [2021-07-09 18:17:39,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:39,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-07-09 18:17:39,287 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:39,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:39,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:17:39,301 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:75, output treesize:74 [2021-07-09 18:17:39,681 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-07-09 18:17:39,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:39,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:39,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:39,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 44 [2021-07-09 18:17:39,697 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:39,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:39,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:39,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:39,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:39,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 35 [2021-07-09 18:17:39,708 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:39,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:39,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:39,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:39,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:39,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 31 [2021-07-09 18:17:39,716 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:39,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:39,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:17:39,722 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:28 [2021-07-09 18:17:39,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-07-09 18:17:39,816 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:39,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:39,817 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:17:39,817 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:5 [2021-07-09 18:17:39,836 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:39,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162480324] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:39,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:39,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 18:17:39,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82033903] [2021-07-09 18:17:39,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:17:39,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:39,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:17:39,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:17:39,837 INFO L87 Difference]: Start difference. First operand 88432 states and 317682 transitions. Second operand has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:41,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:41,229 INFO L93 Difference]: Finished difference Result 88979 states and 319231 transitions. [2021-07-09 18:17:41,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:17:41,229 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:17:41,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:41,570 INFO L225 Difference]: With dead ends: 88979 [2021-07-09 18:17:41,570 INFO L226 Difference]: Without dead ends: 88954 [2021-07-09 18:17:41,570 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 923.1ms TimeCoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:17:41,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88954 states. [2021-07-09 18:17:43,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88954 to 88462. [2021-07-09 18:17:43,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88462 states, 88461 states have (on average 3.5924079537875446) internal successors, (317788), 88461 states have internal predecessors, (317788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:44,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88462 states to 88462 states and 317788 transitions. [2021-07-09 18:17:44,273 INFO L78 Accepts]: Start accepts. Automaton has 88462 states and 317788 transitions. Word has length 37 [2021-07-09 18:17:44,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:44,274 INFO L482 AbstractCegarLoop]: Abstraction has 88462 states and 317788 transitions. [2021-07-09 18:17:44,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:44,274 INFO L276 IsEmpty]: Start isEmpty. Operand 88462 states and 317788 transitions. [2021-07-09 18:17:44,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:17:44,405 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:44,405 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:44,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-07-09 18:17:44,621 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:44,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:44,621 INFO L82 PathProgramCache]: Analyzing trace with hash 2229561, now seen corresponding path program 90 times [2021-07-09 18:17:44,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:44,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118881612] [2021-07-09 18:17:44,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:44,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:44,945 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:44,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:44,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118881612] [2021-07-09 18:17:44,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118881612] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:44,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975993728] [2021-07-09 18:17:44,945 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:44,977 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:17:44,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:44,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 18:17:44,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:45,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-07-09 18:17:45,088 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:45,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:45,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:17:45,104 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:55 [2021-07-09 18:17:45,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:45,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-07-09 18:17:45,156 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:45,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:45,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:17:45,171 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:62, output treesize:61 [2021-07-09 18:17:45,554 INFO L446 ElimStorePlain]: Different costs {2=[v_C_141], 9=[A, B]} [2021-07-09 18:17:45,577 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-07-09 18:17:45,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 45 [2021-07-09 18:17:45,579 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:45,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:45,895 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-07-09 18:17:45,896 INFO L354 Elim1Store]: treesize reduction 16, result has 78.1 percent of original size [2021-07-09 18:17:45,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 62 treesize of output 102 [2021-07-09 18:17:45,947 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:46,193 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 101 [2021-07-09 18:17:46,194 INFO L628 ElimStorePlain]: treesize reduction 251, result has 56.3 percent of original size [2021-07-09 18:17:46,273 INFO L354 Elim1Store]: treesize reduction 8, result has 89.0 percent of original size [2021-07-09 18:17:46,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 291 treesize of output 307 [2021-07-09 18:17:46,615 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 156 [2021-07-09 18:17:47,173 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 621 DAG size of output: 576 [2021-07-09 18:17:47,574 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 803 DAG size of output: 752 [2021-07-09 18:17:47,752 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 803 DAG size of output: 752 [2021-07-09 18:17:47,925 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 803 DAG size of output: 752 [2021-07-09 18:17:48,084 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 747 DAG size of output: 749 [2021-07-09 18:17:48,091 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-07-09 18:18:41,494 WARN L205 SmtUtils]: Spent 53.40 s on a formula simplification. DAG size of input: 763 DAG size of output: 138 [2021-07-09 18:18:41,494 INFO L628 ElimStorePlain]: treesize reduction 8316, result has 4.7 percent of original size [2021-07-09 18:18:42,032 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:18:42,032 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:92, output treesize:466 [2021-07-09 18:18:43,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:43,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:43,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:43,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-07-09 18:18:43,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:18:43,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:18:43,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:18:43,301 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:17 [2021-07-09 18:18:43,359 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:43,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975993728] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:43,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:43,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 24 [2021-07-09 18:18:43,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805642097] [2021-07-09 18:18:43,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:18:43,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:43,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:18:43,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:18:43,360 INFO L87 Difference]: Start difference. First operand 88462 states and 317788 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:46,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:46,842 INFO L93 Difference]: Finished difference Result 89473 states and 320728 transitions. [2021-07-09 18:18:46,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:18:46,843 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:18:46,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:47,193 INFO L225 Difference]: With dead ends: 89473 [2021-07-09 18:18:47,193 INFO L226 Difference]: Without dead ends: 89252 [2021-07-09 18:18:47,193 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 2502.6ms TimeCoverageRelationStatistics Valid=177, Invalid=1715, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:18:47,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89252 states. [2021-07-09 18:18:49,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89252 to 88528. [2021-07-09 18:18:49,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88528 states, 88527 states have (on average 3.5922261005117084) internal successors, (318009), 88527 states have internal predecessors, (318009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:49,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88528 states to 88528 states and 318009 transitions. [2021-07-09 18:18:49,833 INFO L78 Accepts]: Start accepts. Automaton has 88528 states and 318009 transitions. Word has length 37 [2021-07-09 18:18:49,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:49,834 INFO L482 AbstractCegarLoop]: Abstraction has 88528 states and 318009 transitions. [2021-07-09 18:18:49,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:49,834 INFO L276 IsEmpty]: Start isEmpty. Operand 88528 states and 318009 transitions. [2021-07-09 18:18:49,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:18:49,972 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:49,972 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:50,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-07-09 18:18:50,172 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:50,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:50,173 INFO L82 PathProgramCache]: Analyzing trace with hash -2142634043, now seen corresponding path program 91 times [2021-07-09 18:18:50,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:50,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573384308] [2021-07-09 18:18:50,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:50,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:50,674 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:50,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:50,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573384308] [2021-07-09 18:18:50,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573384308] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:50,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092063541] [2021-07-09 18:18:50,675 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:50,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:50,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:18:50,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:50,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-07-09 18:18:50,781 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:18:50,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:18:50,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:18:50,793 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-07-09 18:18:50,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:50,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-07-09 18:18:50,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:18:50,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:18:50,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:18:50,859 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:62, output treesize:61 [2021-07-09 18:18:51,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 45 [2021-07-09 18:18:51,002 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:18:51,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:18:51,017 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:18:51,017 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:70 [2021-07-09 18:18:51,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 39 [2021-07-09 18:18:51,074 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:18:51,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:18:51,083 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:18:51,083 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:70, output treesize:43 [2021-07-09 18:18:51,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-07-09 18:18:51,398 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:18:51,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:18:51,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2021-07-09 18:18:51,405 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:18:51,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:18:51,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:18:51,406 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:46, output treesize:7 [2021-07-09 18:18:51,429 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:51,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092063541] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:51,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:51,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-07-09 18:18:51,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752556741] [2021-07-09 18:18:51,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:18:51,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:51,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:18:51,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:18:51,430 INFO L87 Difference]: Start difference. First operand 88528 states and 318009 transitions. Second operand has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:54,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:54,475 INFO L93 Difference]: Finished difference Result 135604 states and 483456 transitions. [2021-07-09 18:18:54,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 18:18:54,475 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:18:54,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:55,106 INFO L225 Difference]: With dead ends: 135604 [2021-07-09 18:18:55,107 INFO L226 Difference]: Without dead ends: 135552 [2021-07-09 18:18:55,107 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 2038.1ms TimeCoverageRelationStatistics Valid=285, Invalid=1877, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:18:55,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135552 states. [2021-07-09 18:18:57,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135552 to 88567. [2021-07-09 18:18:57,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88567 states, 88566 states have (on average 3.5919653140031165) internal successors, (318126), 88566 states have internal predecessors, (318126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:58,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88567 states to 88567 states and 318126 transitions. [2021-07-09 18:18:58,035 INFO L78 Accepts]: Start accepts. Automaton has 88567 states and 318126 transitions. Word has length 37 [2021-07-09 18:18:58,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:58,035 INFO L482 AbstractCegarLoop]: Abstraction has 88567 states and 318126 transitions. [2021-07-09 18:18:58,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:58,035 INFO L276 IsEmpty]: Start isEmpty. Operand 88567 states and 318126 transitions. [2021-07-09 18:18:58,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:18:58,152 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:58,152 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:58,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable437 [2021-07-09 18:18:58,353 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:58,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:58,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1033537961, now seen corresponding path program 92 times [2021-07-09 18:18:58,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:58,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893518841] [2021-07-09 18:18:58,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:58,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:58,785 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:58,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:58,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893518841] [2021-07-09 18:18:58,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893518841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:58,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371160961] [2021-07-09 18:18:58,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:58,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:18:58,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:58,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:18:58,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:58,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-07-09 18:18:58,929 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:18:58,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:18:58,943 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:18:58,943 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:69, output treesize:68 [2021-07-09 18:18:59,300 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-07-09 18:18:59,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:59,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2021-07-09 18:18:59,312 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:18:59,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:18:59,328 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:18:59,328 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:84, output treesize:83 [2021-07-09 18:18:59,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:59,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:59,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:59,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 60 [2021-07-09 18:18:59,469 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:18:59,486 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:18:59,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:18:59,486 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:101, output treesize:114 [2021-07-09 18:18:59,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:59,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:59,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:59,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 67 [2021-07-09 18:18:59,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:18:59,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:18:59,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:59,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:59,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:59,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 21 [2021-07-09 18:18:59,567 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:18:59,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:18:59,572 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:18:59,572 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:117, output treesize:31 [2021-07-09 18:18:59,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-07-09 18:18:59,606 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:18:59,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:18:59,608 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:18:59,608 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:5 [2021-07-09 18:18:59,632 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:59,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371160961] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:59,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:59,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2021-07-09 18:18:59,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284945014] [2021-07-09 18:18:59,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:18:59,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:59,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:18:59,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:18:59,633 INFO L87 Difference]: Start difference. First operand 88567 states and 318126 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:02,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:02,621 INFO L93 Difference]: Finished difference Result 136625 states and 486583 transitions. [2021-07-09 18:19:02,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 18:19:02,622 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:19:02,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:03,194 INFO L225 Difference]: With dead ends: 136625 [2021-07-09 18:19:03,194 INFO L226 Difference]: Without dead ends: 136440 [2021-07-09 18:19:03,195 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 2016.9ms TimeCoverageRelationStatistics Valid=316, Invalid=1754, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:19:03,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136440 states. [2021-07-09 18:19:05,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136440 to 88540. [2021-07-09 18:19:05,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88540 states, 88539 states have (on average 3.592145834039237) internal successors, (318045), 88539 states have internal predecessors, (318045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:06,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88540 states to 88540 states and 318045 transitions. [2021-07-09 18:19:06,118 INFO L78 Accepts]: Start accepts. Automaton has 88540 states and 318045 transitions. Word has length 37 [2021-07-09 18:19:06,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:06,119 INFO L482 AbstractCegarLoop]: Abstraction has 88540 states and 318045 transitions. [2021-07-09 18:19:06,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:06,119 INFO L276 IsEmpty]: Start isEmpty. Operand 88540 states and 318045 transitions. [2021-07-09 18:19:06,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:19:06,231 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:06,232 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:06,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:06,433 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:06,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:06,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1788466979, now seen corresponding path program 93 times [2021-07-09 18:19:06,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:06,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932103765] [2021-07-09 18:19:06,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:06,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:06,769 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:06,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:06,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932103765] [2021-07-09 18:19:06,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932103765] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:06,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162415989] [2021-07-09 18:19:06,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:06,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:19:06,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:06,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 18:19:06,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:07,167 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-07-09 18:19:07,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-07-09 18:19:07,250 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:07,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:07,261 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:19:07,261 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:39 [2021-07-09 18:19:07,307 INFO L354 Elim1Store]: treesize reduction 29, result has 14.7 percent of original size [2021-07-09 18:19:07,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-07-09 18:19:07,308 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:07,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:07,321 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:19:07,321 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:56 [2021-07-09 18:19:07,718 INFO L446 ElimStorePlain]: Different costs {6=[v_C_150], 9=[A, B]} [2021-07-09 18:19:07,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:07,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:07,749 INFO L354 Elim1Store]: treesize reduction 62, result has 23.5 percent of original size [2021-07-09 18:19:07,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 52 treesize of output 64 [2021-07-09 18:19:07,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:07,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:07,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:07,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:07,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:07,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:07,817 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-07-09 18:19:07,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 52 treesize of output 64 [2021-07-09 18:19:07,820 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 18:19:07,873 INFO L628 ElimStorePlain]: treesize reduction 27, result has 76.3 percent of original size [2021-07-09 18:19:07,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:07,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:07,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:07,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:07,901 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:07,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 48 treesize of output 78 [2021-07-09 18:19:07,926 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 5 xjuncts. [2021-07-09 18:19:07,980 INFO L628 ElimStorePlain]: treesize reduction 82, result has 44.2 percent of original size [2021-07-09 18:19:07,991 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 3 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:19:07,991 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:98, output treesize:63 [2021-07-09 18:19:08,153 INFO L446 ElimStorePlain]: Different costs {0=[C], 7=[v_prenex_2]} [2021-07-09 18:19:08,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2021-07-09 18:19:08,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:08,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:08,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:08,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:08,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:08,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:19:08,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:08,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:19:08,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-07-09 18:19:08,178 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:08,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:08,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:19:08,190 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:20 [2021-07-09 18:19:08,246 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:08,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162415989] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:08,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:08,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 26 [2021-07-09 18:19:08,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121276605] [2021-07-09 18:19:08,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:19:08,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:08,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:19:08,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=638, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:19:08,247 INFO L87 Difference]: Start difference. First operand 88540 states and 318045 transitions. Second operand has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:12,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:12,093 INFO L93 Difference]: Finished difference Result 89935 states and 322061 transitions. [2021-07-09 18:19:12,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:19:12,093 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:19:12,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:12,661 INFO L225 Difference]: With dead ends: 89935 [2021-07-09 18:19:12,662 INFO L226 Difference]: Without dead ends: 89629 [2021-07-09 18:19:12,662 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 2239.5ms TimeCoverageRelationStatistics Valid=214, Invalid=2138, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:19:12,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89629 states. [2021-07-09 18:19:14,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89629 to 88622. [2021-07-09 18:19:14,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88622 states, 88621 states have (on average 3.591631780277812) internal successors, (318294), 88621 states have internal predecessors, (318294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:15,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88622 states to 88622 states and 318294 transitions. [2021-07-09 18:19:15,511 INFO L78 Accepts]: Start accepts. Automaton has 88622 states and 318294 transitions. Word has length 37 [2021-07-09 18:19:15,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:15,512 INFO L482 AbstractCegarLoop]: Abstraction has 88622 states and 318294 transitions. [2021-07-09 18:19:15,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:15,512 INFO L276 IsEmpty]: Start isEmpty. Operand 88622 states and 318294 transitions. [2021-07-09 18:19:15,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:19:15,649 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:15,649 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:15,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable439,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:15,850 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:15,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:15,851 INFO L82 PathProgramCache]: Analyzing trace with hash -786487325, now seen corresponding path program 94 times [2021-07-09 18:19:15,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:15,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199030700] [2021-07-09 18:19:15,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:15,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:16,253 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:16,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:16,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199030700] [2021-07-09 18:19:16,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199030700] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:16,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347214479] [2021-07-09 18:19:16,253 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:16,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:19:16,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:16,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:19:16,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:16,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-07-09 18:19:16,378 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:16,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:16,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:19:16,394 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-07-09 18:19:16,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:16,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-07-09 18:19:16,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:16,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:16,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:19:16,471 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:62, output treesize:61 [2021-07-09 18:19:16,936 INFO L446 ElimStorePlain]: Different costs {3=[v_C_153], 12=[A, B]} [2021-07-09 18:19:16,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:16,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:16,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:16,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 55 [2021-07-09 18:19:16,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:16,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:16,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:16,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:16,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:19:16,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:16,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:19:16,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-07-09 18:19:16,961 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:16,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:16,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:16,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:16,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:19:16,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:16,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:19:16,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 26 [2021-07-09 18:19:16,974 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:16,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:16,979 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:19:16,979 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:81, output treesize:25 [2021-07-09 18:19:17,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2021-07-09 18:19:17,037 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:17,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:17,039 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:19:17,039 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-07-09 18:19:17,058 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:17,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347214479] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:17,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:17,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-07-09 18:19:17,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930024261] [2021-07-09 18:19:17,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:19:17,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:17,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:19:17,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:19:17,058 INFO L87 Difference]: Start difference. First operand 88622 states and 318294 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:18,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:18,278 INFO L93 Difference]: Finished difference Result 89197 states and 319956 transitions. [2021-07-09 18:19:18,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:19:18,279 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:19:18,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:18,625 INFO L225 Difference]: With dead ends: 89197 [2021-07-09 18:19:18,625 INFO L226 Difference]: Without dead ends: 89068 [2021-07-09 18:19:18,625 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 993.7ms TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:19:18,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89068 states. [2021-07-09 18:19:20,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89068 to 88604. [2021-07-09 18:19:20,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88604 states, 88603 states have (on average 3.5918196900782142) internal successors, (318246), 88603 states have internal predecessors, (318246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:21,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88604 states to 88604 states and 318246 transitions. [2021-07-09 18:19:21,009 INFO L78 Accepts]: Start accepts. Automaton has 88604 states and 318246 transitions. Word has length 37 [2021-07-09 18:19:21,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:21,009 INFO L482 AbstractCegarLoop]: Abstraction has 88604 states and 318246 transitions. [2021-07-09 18:19:21,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:21,009 INFO L276 IsEmpty]: Start isEmpty. Operand 88604 states and 318246 transitions. [2021-07-09 18:19:21,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:19:21,555 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:21,555 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:21,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable471,97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:21,756 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:21,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:21,757 INFO L82 PathProgramCache]: Analyzing trace with hash 783543365, now seen corresponding path program 95 times [2021-07-09 18:19:21,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:21,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649113126] [2021-07-09 18:19:21,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:21,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:22,189 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:22,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:22,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649113126] [2021-07-09 18:19:22,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649113126] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:22,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33769773] [2021-07-09 18:19:22,189 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:22,226 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 18:19:22,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:22,227 WARN L261 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-09 18:19:22,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:22,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-07-09 18:19:22,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:22,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:22,339 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:19:22,339 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:62, output treesize:61 [2021-07-09 18:19:22,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:22,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-07-09 18:19:22,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:22,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:22,456 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:19:22,456 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:73, output treesize:72 [2021-07-09 18:19:22,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:22,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:22,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:22,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 59 [2021-07-09 18:19:22,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:22,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:22,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:19:22,722 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:101, output treesize:105 [2021-07-09 18:19:22,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:22,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:22,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:22,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 54 [2021-07-09 18:19:22,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:22,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:22,861 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:19:22,862 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:113, output treesize:76 [2021-07-09 18:19:22,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-07-09 18:19:22,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:22,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:22,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-07-09 18:19:22,966 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:22,967 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:22,967 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:19:22,967 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:46, output treesize:7 [2021-07-09 18:19:22,990 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:22,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33769773] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:22,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:22,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-07-09 18:19:22,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242858082] [2021-07-09 18:19:22,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:19:22,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:22,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:19:22,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:19:22,991 INFO L87 Difference]: Start difference. First operand 88604 states and 318246 transitions. Second operand has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:26,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:26,432 INFO L93 Difference]: Finished difference Result 135984 states and 484720 transitions. [2021-07-09 18:19:26,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:19:26,432 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:19:26,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:27,057 INFO L225 Difference]: With dead ends: 135984 [2021-07-09 18:19:27,057 INFO L226 Difference]: Without dead ends: 135932 [2021-07-09 18:19:27,058 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 2126.2ms TimeCoverageRelationStatistics Valid=275, Invalid=2077, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:19:27,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135932 states. [2021-07-09 18:19:29,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135932 to 88658. [2021-07-09 18:19:29,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88658 states, 88657 states have (on average 3.5914592192381876) internal successors, (318408), 88657 states have internal predecessors, (318408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:30,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88658 states to 88658 states and 318408 transitions. [2021-07-09 18:19:30,001 INFO L78 Accepts]: Start accepts. Automaton has 88658 states and 318408 transitions. Word has length 37 [2021-07-09 18:19:30,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:30,002 INFO L482 AbstractCegarLoop]: Abstraction has 88658 states and 318408 transitions. [2021-07-09 18:19:30,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:30,002 INFO L276 IsEmpty]: Start isEmpty. Operand 88658 states and 318408 transitions. [2021-07-09 18:19:30,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:19:30,127 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:30,127 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:30,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:30,328 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:30,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:30,328 INFO L82 PathProgramCache]: Analyzing trace with hash -335251927, now seen corresponding path program 96 times [2021-07-09 18:19:30,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:30,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62403041] [2021-07-09 18:19:30,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:30,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:30,914 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:30,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:30,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62403041] [2021-07-09 18:19:30,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62403041] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:30,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396456848] [2021-07-09 18:19:30,914 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:30,946 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 18:19:30,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:30,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-09 18:19:30,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:31,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-07-09 18:19:31,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:31,389 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-07-09 18:19:31,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:31,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:19:31,390 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-07-09 18:19:31,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:31,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-07-09 18:19:31,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:31,447 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:31,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:19:31,447 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:62, output treesize:61 [2021-07-09 18:19:31,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:31,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:31,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 43 [2021-07-09 18:19:31,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:31,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:31,603 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:19:31,604 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:74 [2021-07-09 18:19:31,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:31,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:31,827 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:31,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 58 [2021-07-09 18:19:31,829 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:31,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:31,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:31,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:31,872 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:31,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 94 [2021-07-09 18:19:31,895 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 18:19:31,967 INFO L628 ElimStorePlain]: treesize reduction 68, result has 66.3 percent of original size [2021-07-09 18:19:32,019 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:19:32,019 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:86, output treesize:215 [2021-07-09 18:19:32,389 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:32,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 32 [2021-07-09 18:19:32,392 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:19:32,409 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:32,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 32 [2021-07-09 18:19:32,412 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 18:19:32,431 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:32,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 23 [2021-07-09 18:19:32,433 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:32,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:32,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:32,460 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:32,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 48 [2021-07-09 18:19:32,463 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-09 18:19:32,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:32,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:32,501 INFO L354 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2021-07-09 18:19:32,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 35 [2021-07-09 18:19:32,503 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:32,522 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:32,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 23 [2021-07-09 18:19:32,524 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:32,542 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:32,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 23 [2021-07-09 18:19:32,544 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:32,547 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 18:19:32,548 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:32,552 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 18:19:32,552 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:32,555 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 18:19:32,556 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:32,856 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-07-09 18:19:32,856 INFO L628 ElimStorePlain]: treesize reduction 91, result has 70.3 percent of original size [2021-07-09 18:19:32,864 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-07-09 18:19:32,864 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:452, output treesize:224 [2021-07-09 18:19:32,999 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:33,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396456848] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:33,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:33,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 27 [2021-07-09 18:19:33,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550044946] [2021-07-09 18:19:33,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:19:33,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:33,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:19:33,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=660, Unknown=1, NotChecked=0, Total=756 [2021-07-09 18:19:33,000 INFO L87 Difference]: Start difference. First operand 88658 states and 318408 transitions. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:33,864 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 59 [2021-07-09 18:19:42,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:42,973 INFO L93 Difference]: Finished difference Result 138458 states and 492183 transitions. [2021-07-09 18:19:42,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-09 18:19:42,974 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:19:42,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:43,877 INFO L225 Difference]: With dead ends: 138458 [2021-07-09 18:19:43,878 INFO L226 Difference]: Without dead ends: 138226 [2021-07-09 18:19:43,879 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1554 ImplicationChecksByTransitivity, 4586.2ms TimeCoverageRelationStatistics Valid=948, Invalid=5055, Unknown=3, NotChecked=0, Total=6006 [2021-07-09 18:19:44,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138226 states. [2021-07-09 18:19:46,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138226 to 88685. [2021-07-09 18:19:46,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88685 states, 88684 states have (on average 3.5912791484371476) internal successors, (318489), 88684 states have internal predecessors, (318489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:46,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88685 states to 88685 states and 318489 transitions. [2021-07-09 18:19:46,918 INFO L78 Accepts]: Start accepts. Automaton has 88685 states and 318489 transitions. Word has length 37 [2021-07-09 18:19:46,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:46,918 INFO L482 AbstractCegarLoop]: Abstraction has 88685 states and 318489 transitions. [2021-07-09 18:19:46,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:46,919 INFO L276 IsEmpty]: Start isEmpty. Operand 88685 states and 318489 transitions. [2021-07-09 18:19:47,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:19:47,069 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:47,069 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:47,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:47,269 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:47,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:47,270 INFO L82 PathProgramCache]: Analyzing trace with hash 2010003491, now seen corresponding path program 97 times [2021-07-09 18:19:47,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:47,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029988191] [2021-07-09 18:19:47,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:47,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:47,795 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:47,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:47,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029988191] [2021-07-09 18:19:47,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029988191] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:47,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557066709] [2021-07-09 18:19:47,796 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:47,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:47,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:19:47,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:47,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-07-09 18:19:47,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:47,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:47,910 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:19:47,910 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:50 [2021-07-09 18:19:47,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:47,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-07-09 18:19:47,953 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:47,967 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:47,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:19:47,971 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:62, output treesize:61 [2021-07-09 18:19:48,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 43 [2021-07-09 18:19:48,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:48,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:48,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:19:48,071 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:64, output treesize:63 [2021-07-09 18:19:48,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-07-09 18:19:48,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:48,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:48,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2021-07-09 18:19:48,142 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:48,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:48,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:19:48,147 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:66, output treesize:23 [2021-07-09 18:19:48,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-07-09 18:19:48,209 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:48,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:48,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:19:48,211 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:5 [2021-07-09 18:19:48,237 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:48,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557066709] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:48,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:48,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-07-09 18:19:48,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561819740] [2021-07-09 18:19:48,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:19:48,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:48,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:19:48,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:19:48,238 INFO L87 Difference]: Start difference. First operand 88685 states and 318489 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:48,656 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-07-09 18:19:51,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:51,855 INFO L93 Difference]: Finished difference Result 136820 states and 487334 transitions. [2021-07-09 18:19:51,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:19:51,855 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:19:51,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:52,483 INFO L225 Difference]: With dead ends: 136820 [2021-07-09 18:19:52,483 INFO L226 Difference]: Without dead ends: 136614 [2021-07-09 18:19:52,483 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 2111.7ms TimeCoverageRelationStatistics Valid=286, Invalid=1784, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:19:52,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136614 states. [2021-07-09 18:19:54,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136614 to 88703. [2021-07-09 18:19:54,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88703 states, 88702 states have (on average 3.5911704358413563) internal successors, (318544), 88702 states have internal predecessors, (318544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:55,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88703 states to 88703 states and 318544 transitions. [2021-07-09 18:19:55,487 INFO L78 Accepts]: Start accepts. Automaton has 88703 states and 318544 transitions. Word has length 37 [2021-07-09 18:19:55,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:55,487 INFO L482 AbstractCegarLoop]: Abstraction has 88703 states and 318544 transitions. [2021-07-09 18:19:55,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:55,487 INFO L276 IsEmpty]: Start isEmpty. Operand 88703 states and 318544 transitions. [2021-07-09 18:19:55,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:19:55,610 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:55,610 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:55,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable512 [2021-07-09 18:19:55,811 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:55,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:55,811 INFO L82 PathProgramCache]: Analyzing trace with hash -278214679, now seen corresponding path program 98 times [2021-07-09 18:19:55,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:55,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116734856] [2021-07-09 18:19:55,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:55,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:56,140 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:56,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:56,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116734856] [2021-07-09 18:19:56,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116734856] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:56,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471183602] [2021-07-09 18:19:56,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:56,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:19:56,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:56,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 18:19:56,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:56,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-07-09 18:19:56,267 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:56,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:56,282 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:19:56,282 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:62, output treesize:61 [2021-07-09 18:19:56,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:56,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-07-09 18:19:56,326 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:56,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:56,343 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:19:56,343 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:73, output treesize:72 [2021-07-09 18:19:56,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2021-07-09 18:19:56,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:56,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:56,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-07-09 18:19:56,830 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:56,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:56,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 29 [2021-07-09 18:19:56,838 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:56,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:56,845 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:19:56,845 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:74, output treesize:30 [2021-07-09 18:19:56,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2021-07-09 18:19:56,884 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:56,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:56,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:19:56,890 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-07-09 18:19:56,931 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:56,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471183602] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:56,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:56,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-09 18:19:56,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180289832] [2021-07-09 18:19:56,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:19:56,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:56,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:19:56,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:19:56,932 INFO L87 Difference]: Start difference. First operand 88703 states and 318544 transitions. Second operand has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:58,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:58,155 INFO L93 Difference]: Finished difference Result 89417 states and 320556 transitions. [2021-07-09 18:19:58,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:19:58,164 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:19:58,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:58,493 INFO L225 Difference]: With dead ends: 89417 [2021-07-09 18:19:58,493 INFO L226 Difference]: Without dead ends: 89247 [2021-07-09 18:19:58,493 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 641.2ms TimeCoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:19:58,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89247 states. [2021-07-09 18:20:00,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89247 to 88757. [2021-07-09 18:20:00,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88757 states, 88756 states have (on average 3.5907431610257334) internal successors, (318700), 88756 states have internal predecessors, (318700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:00,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88757 states to 88757 states and 318700 transitions. [2021-07-09 18:20:00,843 INFO L78 Accepts]: Start accepts. Automaton has 88757 states and 318700 transitions. Word has length 37 [2021-07-09 18:20:00,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:00,844 INFO L482 AbstractCegarLoop]: Abstraction has 88757 states and 318700 transitions. [2021-07-09 18:20:00,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:00,844 INFO L276 IsEmpty]: Start isEmpty. Operand 88757 states and 318700 transitions. [2021-07-09 18:20:01,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:20:01,386 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:01,386 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:01,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable513,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:01,586 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:01,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:01,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1441798313, now seen corresponding path program 99 times [2021-07-09 18:20:01,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:01,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929620044] [2021-07-09 18:20:01,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:01,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:01,901 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:01,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:01,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929620044] [2021-07-09 18:20:01,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929620044] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:01,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417821231] [2021-07-09 18:20:01,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:01,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:20:01,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:01,933 WARN L261 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-09 18:20:01,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:02,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-07-09 18:20:02,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:20:02,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:02,039 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:20:02,039 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:39 [2021-07-09 18:20:02,089 INFO L354 Elim1Store]: treesize reduction 29, result has 14.7 percent of original size [2021-07-09 18:20:02,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-07-09 18:20:02,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:20:02,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:02,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:20:02,105 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:56 [2021-07-09 18:20:02,372 INFO L446 ElimStorePlain]: Different costs {3=[v_C_168], 14=[A, B]} [2021-07-09 18:20:02,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:02,388 INFO L354 Elim1Store]: treesize reduction 39, result has 15.2 percent of original size [2021-07-09 18:20:02,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 55 [2021-07-09 18:20:02,389 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:20:02,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:02,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:02,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:02,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:20:02,474 INFO L354 Elim1Store]: treesize reduction 22, result has 67.2 percent of original size [2021-07-09 18:20:02,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 86 [2021-07-09 18:20:02,487 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 18:20:02,648 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 61 [2021-07-09 18:20:02,648 INFO L628 ElimStorePlain]: treesize reduction 247, result has 35.7 percent of original size [2021-07-09 18:20:02,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:02,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:02,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:20:02,687 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:02,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 108 treesize of output 148 [2021-07-09 18:20:02,922 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 109 [2021-07-09 18:20:03,305 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-07-09 18:20:03,758 WARN L205 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 57 [2021-07-09 18:20:03,758 INFO L628 ElimStorePlain]: treesize reduction 2210, result has 5.5 percent of original size [2021-07-09 18:20:03,777 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 3 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:20:03,778 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:100, output treesize:168 [2021-07-09 18:20:04,500 INFO L446 ElimStorePlain]: Different costs {0=[C], 7=[v_prenex_6]} [2021-07-09 18:20:04,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2021-07-09 18:20:04,504 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:20:04,530 INFO L628 ElimStorePlain]: treesize reduction 5, result has 90.2 percent of original size [2021-07-09 18:20:04,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:04,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:04,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:20:04,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:04,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:20:04,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-07-09 18:20:04,536 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:20:04,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:04,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:20:04,546 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:20 [2021-07-09 18:20:04,609 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:04,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417821231] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:04,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:04,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 27 [2021-07-09 18:20:04,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729356745] [2021-07-09 18:20:04,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:20:04,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:04,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:20:04,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=694, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:20:04,610 INFO L87 Difference]: Start difference. First operand 88757 states and 318700 transitions. Second operand has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:05,288 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-07-09 18:20:07,244 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 107 [2021-07-09 18:20:08,223 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 105 [2021-07-09 18:20:09,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:09,252 INFO L93 Difference]: Finished difference Result 90270 states and 322896 transitions. [2021-07-09 18:20:09,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:20:09,252 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:20:09,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:10,006 INFO L225 Difference]: With dead ends: 90270 [2021-07-09 18:20:10,006 INFO L226 Difference]: Without dead ends: 89941 [2021-07-09 18:20:10,006 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 2797.0ms TimeCoverageRelationStatistics Valid=184, Invalid=2072, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:20:10,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89941 states. [2021-07-09 18:20:11,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89941 to 88767. [2021-07-09 18:20:12,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88767 states, 88766 states have (on average 3.5908343284590947) internal successors, (318744), 88766 states have internal predecessors, (318744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:12,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88767 states to 88767 states and 318744 transitions. [2021-07-09 18:20:12,814 INFO L78 Accepts]: Start accepts. Automaton has 88767 states and 318744 transitions. Word has length 37 [2021-07-09 18:20:12,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:12,815 INFO L482 AbstractCegarLoop]: Abstraction has 88767 states and 318744 transitions. [2021-07-09 18:20:12,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:12,815 INFO L276 IsEmpty]: Start isEmpty. Operand 88767 states and 318744 transitions. [2021-07-09 18:20:12,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:20:12,939 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:12,940 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:13,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable514 [2021-07-09 18:20:13,141 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:13,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:13,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1763816007, now seen corresponding path program 100 times [2021-07-09 18:20:13,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:13,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701985709] [2021-07-09 18:20:13,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:13,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:13,407 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:13,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:13,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701985709] [2021-07-09 18:20:13,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701985709] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:13,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836222378] [2021-07-09 18:20:13,408 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:13,446 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:20:13,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:13,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:20:13,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:13,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-07-09 18:20:13,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:20:13,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:13,592 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:20:13,592 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:69, output treesize:68 [2021-07-09 18:20:13,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:13,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2021-07-09 18:20:13,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:20:13,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:13,669 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:20:13,669 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:84, output treesize:83 [2021-07-09 18:20:13,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:13,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:13,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:13,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 44 [2021-07-09 18:20:13,793 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:20:14,350 WARN L205 SmtUtils]: Spent 556.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-07-09 18:20:14,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:14,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:14,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:14,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:14,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 43 [2021-07-09 18:20:14,357 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:20:14,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:14,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:14,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:14,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:14,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 34 [2021-07-09 18:20:14,373 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:20:14,380 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:14,381 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:20:14,381 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:28 [2021-07-09 18:20:14,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-07-09 18:20:14,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:20:14,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:14,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:20:14,483 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:5 [2021-07-09 18:20:14,501 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:14,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836222378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:14,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:14,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:20:14,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690890946] [2021-07-09 18:20:14,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:20:14,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:14,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:20:14,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:20:14,502 INFO L87 Difference]: Start difference. First operand 88767 states and 318744 transitions. Second operand has 21 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 20 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:15,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:15,680 INFO L93 Difference]: Finished difference Result 89408 states and 320584 transitions. [2021-07-09 18:20:15,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:20:15,680 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 20 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:20:15,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:16,030 INFO L225 Difference]: With dead ends: 89408 [2021-07-09 18:20:16,030 INFO L226 Difference]: Without dead ends: 89383 [2021-07-09 18:20:16,030 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 541.9ms TimeCoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:20:16,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89383 states. [2021-07-09 18:20:17,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89383 to 88737. [2021-07-09 18:20:18,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88737 states, 88736 states have (on average 3.5911016949152543) internal successors, (318660), 88736 states have internal predecessors, (318660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:18,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88737 states to 88737 states and 318660 transitions. [2021-07-09 18:20:18,445 INFO L78 Accepts]: Start accepts. Automaton has 88737 states and 318660 transitions. Word has length 37 [2021-07-09 18:20:18,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:18,445 INFO L482 AbstractCegarLoop]: Abstraction has 88737 states and 318660 transitions. [2021-07-09 18:20:18,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 20 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:18,445 INFO L276 IsEmpty]: Start isEmpty. Operand 88737 states and 318660 transitions. [2021-07-09 18:20:18,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:20:18,577 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:18,577 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:18,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable597 [2021-07-09 18:20:18,778 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:18,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:18,778 INFO L82 PathProgramCache]: Analyzing trace with hash 509494781, now seen corresponding path program 101 times [2021-07-09 18:20:18,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:18,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025077567] [2021-07-09 18:20:18,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:19,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:19,624 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:19,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:19,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025077567] [2021-07-09 18:20:19,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025077567] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:19,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969552352] [2021-07-09 18:20:19,624 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:19,657 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 18:20:19,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:19,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 18:20:19,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:19,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-07-09 18:20:19,746 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:20:19,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:19,759 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:20:19,759 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:48 [2021-07-09 18:20:19,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-07-09 18:20:19,839 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:20:19,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:19,855 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:20:19,855 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:53 [2021-07-09 18:20:19,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 40 [2021-07-09 18:20:19,943 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:20:19,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:19,960 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:20:19,960 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:65, output treesize:64 [2021-07-09 18:20:20,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:20,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:20,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:20,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:20,194 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:20,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 48 treesize of output 102 [2021-07-09 18:20:20,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 18:20:20,655 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 67 [2021-07-09 18:20:20,656 INFO L628 ElimStorePlain]: treesize reduction 1011, result has 13.4 percent of original size [2021-07-09 18:20:20,686 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:20:20,687 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:85, output treesize:212 [2021-07-09 18:20:20,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-07-09 18:20:20,782 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:20:20,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:20,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-07-09 18:20:20,787 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:20:20,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:20,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:20:20,789 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:46, output treesize:7 [2021-07-09 18:20:20,811 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:20,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969552352] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:20,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:20,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 18:20:20,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258190206] [2021-07-09 18:20:20,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:20:20,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:20,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:20:20,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:20:20,812 INFO L87 Difference]: Start difference. First operand 88737 states and 318660 transitions. Second operand has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:24,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:24,049 INFO L93 Difference]: Finished difference Result 135060 states and 481754 transitions. [2021-07-09 18:20:24,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:20:24,050 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:20:24,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:24,654 INFO L225 Difference]: With dead ends: 135060 [2021-07-09 18:20:24,654 INFO L226 Difference]: Without dead ends: 135027 [2021-07-09 18:20:24,654 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 1961.2ms TimeCoverageRelationStatistics Valid=292, Invalid=2158, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:20:25,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135027 states. [2021-07-09 18:20:26,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135027 to 88809. [2021-07-09 18:20:27,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88809 states, 88808 states have (on average 3.5906224664444646) internal successors, (318876), 88808 states have internal predecessors, (318876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:27,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88809 states to 88809 states and 318876 transitions. [2021-07-09 18:20:27,723 INFO L78 Accepts]: Start accepts. Automaton has 88809 states and 318876 transitions. Word has length 37 [2021-07-09 18:20:27,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:27,723 INFO L482 AbstractCegarLoop]: Abstraction has 88809 states and 318876 transitions. [2021-07-09 18:20:27,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:27,723 INFO L276 IsEmpty]: Start isEmpty. Operand 88809 states and 318876 transitions. [2021-07-09 18:20:27,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:20:27,833 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:27,833 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:28,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-07-09 18:20:28,034 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:28,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:28,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1034247721, now seen corresponding path program 102 times [2021-07-09 18:20:28,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:28,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736053845] [2021-07-09 18:20:28,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:28,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:28,483 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:28,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:28,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736053845] [2021-07-09 18:20:28,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736053845] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:28,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670570421] [2021-07-09 18:20:28,483 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:28,527 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 18:20:28,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:28,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-09 18:20:28,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:29,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-07-09 18:20:29,035 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:20:29,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:29,047 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:20:29,048 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:63, output treesize:62 [2021-07-09 18:20:29,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:29,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-07-09 18:20:29,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:20:29,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:29,108 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:20:29,108 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:67 [2021-07-09 18:20:29,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:29,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:29,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:29,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 46 [2021-07-09 18:20:29,203 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:20:29,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:29,226 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:20:29,226 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:87, output treesize:86 [2021-07-09 18:20:29,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:29,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:29,604 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:29,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 58 [2021-07-09 18:20:29,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:20:29,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:29,681 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:20:29,681 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:83, output treesize:127 [2021-07-09 18:20:29,996 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:29,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 38 [2021-07-09 18:20:30,013 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:20:30,039 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:30,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 38 [2021-07-09 18:20:30,043 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 18:20:30,071 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:30,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 23 [2021-07-09 18:20:30,073 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:20:30,100 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:30,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 23 [2021-07-09 18:20:30,103 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:20:30,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:30,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:30,129 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:30,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 46 [2021-07-09 18:20:30,133 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 3 xjuncts. [2021-07-09 18:20:30,307 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 71 [2021-07-09 18:20:30,308 INFO L628 ElimStorePlain]: treesize reduction 53, result has 84.2 percent of original size [2021-07-09 18:20:30,326 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:30,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 73 treesize of output 71 [2021-07-09 18:20:30,337 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-07-09 18:20:30,365 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:30,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 70 [2021-07-09 18:20:30,371 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-07-09 18:20:30,404 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:30,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 23 [2021-07-09 18:20:30,407 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:20:30,447 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:30,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 23 [2021-07-09 18:20:30,450 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:20:30,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:30,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:30,477 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:30,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 43 [2021-07-09 18:20:30,484 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 3 xjuncts. [2021-07-09 18:20:30,805 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 58 [2021-07-09 18:20:30,805 INFO L628 ElimStorePlain]: treesize reduction 168, result has 46.2 percent of original size [2021-07-09 18:20:30,813 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-09 18:20:30,813 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 4 variables, input treesize:264, output treesize:194 [2021-07-09 18:20:30,952 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:30,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670570421] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:30,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:30,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-07-09 18:20:30,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952935191] [2021-07-09 18:20:30,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:20:30,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:30,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:20:30,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:20:30,957 INFO L87 Difference]: Start difference. First operand 88809 states and 318876 transitions. Second operand has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:34,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:34,975 INFO L93 Difference]: Finished difference Result 161911 states and 576190 transitions. [2021-07-09 18:20:34,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:20:34,975 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:20:34,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:36,093 INFO L225 Difference]: With dead ends: 161911 [2021-07-09 18:20:36,094 INFO L226 Difference]: Without dead ends: 161845 [2021-07-09 18:20:36,094 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 3200.4ms TimeCoverageRelationStatistics Valid=530, Invalid=2775, Unknown=1, NotChecked=0, Total=3306 [2021-07-09 18:20:36,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161845 states. [2021-07-09 18:20:38,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161845 to 88852. [2021-07-09 18:20:38,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88852 states, 88851 states have (on average 3.5904379241651756) internal successors, (319014), 88851 states have internal predecessors, (319014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:39,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88852 states to 88852 states and 319014 transitions. [2021-07-09 18:20:39,460 INFO L78 Accepts]: Start accepts. Automaton has 88852 states and 319014 transitions. Word has length 37 [2021-07-09 18:20:39,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:39,460 INFO L482 AbstractCegarLoop]: Abstraction has 88852 states and 319014 transitions. [2021-07-09 18:20:39,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:39,461 INFO L276 IsEmpty]: Start isEmpty. Operand 88852 states and 319014 transitions. [2021-07-09 18:20:39,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:20:39,573 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:39,573 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:39,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable631 [2021-07-09 18:20:39,774 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:39,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:39,774 INFO L82 PathProgramCache]: Analyzing trace with hash -609300511, now seen corresponding path program 103 times [2021-07-09 18:20:39,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:39,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541733703] [2021-07-09 18:20:39,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:39,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:40,156 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:40,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:40,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541733703] [2021-07-09 18:20:40,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541733703] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:40,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326428490] [2021-07-09 18:20:40,157 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:40,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:40,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:20:40,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:40,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-07-09 18:20:40,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:20:40,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:40,295 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:20:40,295 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:59, output treesize:58 [2021-07-09 18:20:40,681 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-07-09 18:20:40,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:40,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2021-07-09 18:20:40,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:20:40,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:40,707 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:20:40,707 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:76, output treesize:75 [2021-07-09 18:20:40,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:40,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:40,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:40,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 52 [2021-07-09 18:20:40,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:20:40,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:40,772 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:20:40,772 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:82, output treesize:81 [2021-07-09 18:20:40,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:40,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:40,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:40,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 45 [2021-07-09 18:20:40,934 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:20:40,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:40,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:40,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:40,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:40,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 37 [2021-07-09 18:20:40,946 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:20:40,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:40,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:20:40,952 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:103, output treesize:42 [2021-07-09 18:20:40,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-07-09 18:20:40,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:20:40,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:40,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:20:40,989 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:5 [2021-07-09 18:20:41,015 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:41,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326428490] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:41,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:41,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2021-07-09 18:20:41,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704507163] [2021-07-09 18:20:41,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:20:41,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:41,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:20:41,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:20:41,016 INFO L87 Difference]: Start difference. First operand 88852 states and 319014 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:44,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:44,017 INFO L93 Difference]: Finished difference Result 135786 states and 484053 transitions. [2021-07-09 18:20:44,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:20:44,018 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:20:44,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:44,612 INFO L225 Difference]: With dead ends: 135786 [2021-07-09 18:20:44,612 INFO L226 Difference]: Without dead ends: 135683 [2021-07-09 18:20:44,612 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 1429.6ms TimeCoverageRelationStatistics Valid=243, Invalid=1397, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:20:45,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135683 states. [2021-07-09 18:20:46,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135683 to 88831. [2021-07-09 18:20:46,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88831 states, 88830 states have (on average 3.590554992682652) internal successors, (318949), 88830 states have internal predecessors, (318949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:47,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88831 states to 88831 states and 318949 transitions. [2021-07-09 18:20:47,663 INFO L78 Accepts]: Start accepts. Automaton has 88831 states and 318949 transitions. Word has length 37 [2021-07-09 18:20:47,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:47,664 INFO L482 AbstractCegarLoop]: Abstraction has 88831 states and 318949 transitions. [2021-07-09 18:20:47,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:47,664 INFO L276 IsEmpty]: Start isEmpty. Operand 88831 states and 318949 transitions. [2021-07-09 18:20:47,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:20:47,791 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:47,792 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:47,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable671,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:47,992 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:47,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:47,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1735954907, now seen corresponding path program 104 times [2021-07-09 18:20:47,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:47,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242597946] [2021-07-09 18:20:47,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:47,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:48,450 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:48,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:48,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242597946] [2021-07-09 18:20:48,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242597946] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:48,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612989638] [2021-07-09 18:20:48,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:48,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:20:48,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:48,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:20:48,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:48,937 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-07-09 18:20:48,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-07-09 18:20:48,945 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:20:48,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:48,957 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:20:48,957 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:46 [2021-07-09 18:20:48,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:48,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-07-09 18:20:48,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:20:49,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:49,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:20:49,014 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:64, output treesize:63 [2021-07-09 18:20:49,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 40 [2021-07-09 18:20:49,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:20:49,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:49,074 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:20:49,074 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:66, output treesize:65 [2021-07-09 18:20:49,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-07-09 18:20:49,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:20:49,182 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:49,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2021-07-09 18:20:49,185 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:20:49,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:49,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:20:49,190 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:66, output treesize:23 [2021-07-09 18:20:49,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-07-09 18:20:49,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:20:49,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:49,256 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:20:49,256 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:5 [2021-07-09 18:20:49,281 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:49,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612989638] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:49,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:49,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2021-07-09 18:20:49,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311364449] [2021-07-09 18:20:49,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:20:49,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:49,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:20:49,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:20:49,282 INFO L87 Difference]: Start difference. First operand 88831 states and 318949 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:51,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:51,973 INFO L93 Difference]: Finished difference Result 135492 states and 483164 transitions. [2021-07-09 18:20:51,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:20:51,974 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:20:51,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:52,618 INFO L225 Difference]: With dead ends: 135492 [2021-07-09 18:20:52,619 INFO L226 Difference]: Without dead ends: 135379 [2021-07-09 18:20:52,619 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1441.9ms TimeCoverageRelationStatistics Valid=212, Invalid=1348, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:20:52,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135379 states. [2021-07-09 18:20:54,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135379 to 88833. [2021-07-09 18:20:54,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88833 states, 88832 states have (on average 3.5906092399135447) internal successors, (318961), 88832 states have internal predecessors, (318961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:55,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88833 states to 88833 states and 318961 transitions. [2021-07-09 18:20:55,936 INFO L78 Accepts]: Start accepts. Automaton has 88833 states and 318961 transitions. Word has length 37 [2021-07-09 18:20:55,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:55,936 INFO L482 AbstractCegarLoop]: Abstraction has 88833 states and 318961 transitions. [2021-07-09 18:20:55,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:55,936 INFO L276 IsEmpty]: Start isEmpty. Operand 88833 states and 318961 transitions. [2021-07-09 18:20:56,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:20:56,122 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:56,124 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:56,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable672,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:56,337 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:56,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:56,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1287858783, now seen corresponding path program 105 times [2021-07-09 18:20:56,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:56,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641494047] [2021-07-09 18:20:56,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:56,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:56,888 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:56,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:56,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641494047] [2021-07-09 18:20:56,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641494047] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:56,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242420887] [2021-07-09 18:20:56,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:56,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:20:56,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:56,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-09 18:20:56,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:57,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-07-09 18:20:57,109 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:20:57,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:57,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:20:57,128 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:56, output treesize:55 [2021-07-09 18:20:57,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:57,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-07-09 18:20:57,190 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:20:57,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:57,218 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:20:57,218 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:67 [2021-07-09 18:20:57,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:57,362 INFO L354 Elim1Store]: treesize reduction 46, result has 22.0 percent of original size [2021-07-09 18:20:57,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 46 [2021-07-09 18:20:57,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:20:57,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:57,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:20:57,394 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:87, output treesize:86 [2021-07-09 18:20:57,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:57,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:57,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:57,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:57,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:57,604 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:57,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 47 [2021-07-09 18:20:57,606 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:20:57,630 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:57,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:57,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:57,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:57,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:57,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:57,644 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:57,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 40 [2021-07-09 18:20:57,647 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 18:20:57,857 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-07-09 18:20:57,857 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:57,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:20:57,873 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:97, output treesize:67 [2021-07-09 18:20:58,239 INFO L446 ElimStorePlain]: Different costs {2=[C], 5=[v_prenex_7]} [2021-07-09 18:20:58,252 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:58,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 23 [2021-07-09 18:20:58,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:20:58,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:58,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:58,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:58,293 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:58,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 39 [2021-07-09 18:20:58,297 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 18:20:58,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:58,321 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:20:58,321 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:81, output treesize:45 [2021-07-09 18:20:58,424 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:58,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242420887] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:58,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:58,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2021-07-09 18:20:58,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714219198] [2021-07-09 18:20:58,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 18:20:58,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:58,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 18:20:58,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=746, Unknown=1, NotChecked=0, Total=870 [2021-07-09 18:20:58,426 INFO L87 Difference]: Start difference. First operand 88833 states and 318961 transitions. Second operand has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:59,811 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 49 [2021-07-09 18:21:03,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:21:03,222 INFO L93 Difference]: Finished difference Result 135881 states and 484094 transitions. [2021-07-09 18:21:03,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:21:03,223 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:21:03,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:21:03,826 INFO L225 Difference]: With dead ends: 135881 [2021-07-09 18:21:03,827 INFO L226 Difference]: Without dead ends: 135833 [2021-07-09 18:21:03,827 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 2344.0ms TimeCoverageRelationStatistics Valid=329, Invalid=1832, Unknown=1, NotChecked=0, Total=2162 [2021-07-09 18:21:04,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135833 states. [2021-07-09 18:21:06,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135833 to 88863. [2021-07-09 18:21:06,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88863 states, 88862 states have (on average 3.590747451103959) internal successors, (319081), 88862 states have internal predecessors, (319081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:06,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88863 states to 88863 states and 319081 transitions. [2021-07-09 18:21:06,773 INFO L78 Accepts]: Start accepts. Automaton has 88863 states and 319081 transitions. Word has length 37 [2021-07-09 18:21:06,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:21:06,773 INFO L482 AbstractCegarLoop]: Abstraction has 88863 states and 319081 transitions. [2021-07-09 18:21:06,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:06,773 INFO L276 IsEmpty]: Start isEmpty. Operand 88863 states and 319081 transitions. [2021-07-09 18:21:06,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:21:06,889 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:21:06,889 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:21:07,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable673 [2021-07-09 18:21:07,089 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:21:07,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:21:07,090 INFO L82 PathProgramCache]: Analyzing trace with hash -82371281, now seen corresponding path program 106 times [2021-07-09 18:21:07,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:21:07,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555159807] [2021-07-09 18:21:07,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:21:07,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:21:08,063 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:08,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:21:08,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555159807] [2021-07-09 18:21:08,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555159807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:08,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244871259] [2021-07-09 18:21:08,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:21:08,100 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:21:08,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:21:08,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:21:08,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:21:08,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-07-09 18:21:08,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:21:08,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:21:08,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:21:08,244 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:59, output treesize:58 [2021-07-09 18:21:08,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:08,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-07-09 18:21:08,296 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:21:08,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:21:08,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:21:08,312 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:70, output treesize:69 [2021-07-09 18:21:08,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:08,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:08,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:08,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 59 [2021-07-09 18:21:08,404 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:21:08,420 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:21:08,421 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:21:08,421 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:98, output treesize:97 [2021-07-09 18:21:08,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:08,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:08,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:08,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 45 [2021-07-09 18:21:08,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:21:08,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:21:08,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:08,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:08,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:08,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 37 [2021-07-09 18:21:08,548 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:21:08,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:21:08,553 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:21:08,553 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:103, output treesize:42 [2021-07-09 18:21:08,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-07-09 18:21:08,588 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:21:08,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:21:08,590 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:21:08,590 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:5 [2021-07-09 18:21:08,615 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:08,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244871259] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:08,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:21:08,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2021-07-09 18:21:08,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004077244] [2021-07-09 18:21:08,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:21:08,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:21:08,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:21:08,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:21:08,616 INFO L87 Difference]: Start difference. First operand 88863 states and 319081 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:12,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:21:12,469 INFO L93 Difference]: Finished difference Result 140988 states and 500508 transitions. [2021-07-09 18:21:12,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:21:12,470 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:21:12,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:21:13,131 INFO L225 Difference]: With dead ends: 140988 [2021-07-09 18:21:13,132 INFO L226 Difference]: Without dead ends: 140779 [2021-07-09 18:21:13,132 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 2869.5ms TimeCoverageRelationStatistics Valid=412, Invalid=2240, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 18:21:13,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140779 states. [2021-07-09 18:21:15,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140779 to 89456. [2021-07-09 18:21:15,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89456 states, 89455 states have (on average 3.591023419596445) internal successors, (321235), 89455 states have internal predecessors, (321235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:16,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89456 states to 89456 states and 321235 transitions. [2021-07-09 18:21:16,154 INFO L78 Accepts]: Start accepts. Automaton has 89456 states and 321235 transitions. Word has length 37 [2021-07-09 18:21:16,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:21:16,154 INFO L482 AbstractCegarLoop]: Abstraction has 89456 states and 321235 transitions. [2021-07-09 18:21:16,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:16,154 INFO L276 IsEmpty]: Start isEmpty. Operand 89456 states and 321235 transitions. [2021-07-09 18:21:16,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:21:16,279 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:21:16,279 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:21:16,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable686 [2021-07-09 18:21:16,480 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:21:16,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:21:16,480 INFO L82 PathProgramCache]: Analyzing trace with hash -781367075, now seen corresponding path program 107 times [2021-07-09 18:21:16,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:21:16,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616375122] [2021-07-09 18:21:16,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:21:16,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:21:16,908 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:16,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:21:16,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616375122] [2021-07-09 18:21:16,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616375122] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:16,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214218627] [2021-07-09 18:21:16,909 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:21:16,939 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:21:16,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:21:16,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 18:21:16,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:21:17,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-07-09 18:21:17,054 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:21:17,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:21:17,067 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:21:17,067 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:56, output treesize:55 [2021-07-09 18:21:17,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:17,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2021-07-09 18:21:17,155 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:21:17,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:21:17,172 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:21:17,172 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:76, output treesize:75 [2021-07-09 18:21:17,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:17,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:17,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:17,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 52 [2021-07-09 18:21:17,572 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:21:17,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:21:17,598 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:21:17,598 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:95, output treesize:94 [2021-07-09 18:21:18,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:18,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:18,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:18,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:18,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:18,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:18,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:18,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:18,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:18,065 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:21:18,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 109 [2021-07-09 18:21:18,080 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:21:18,147 INFO L628 ElimStorePlain]: treesize reduction 228, result has 29.2 percent of original size [2021-07-09 18:21:18,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:21:18,152 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:121, output treesize:91 [2021-07-09 18:21:18,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2021-07-09 18:21:18,259 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:21:18,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:18,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:18,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:18,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:21:18,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:21:18,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:18,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:21:18,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 26 [2021-07-09 18:21:18,266 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:21:18,286 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:21:18,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2021-07-09 18:21:18,292 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:21:18,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:18,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:18,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:18,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:21:18,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:21:18,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:18,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:21:18,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2021-07-09 18:21:18,303 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:21:18,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:21:18,316 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:21:18,316 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:105, output treesize:26 [2021-07-09 18:21:18,405 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:18,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214218627] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:18,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:21:18,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-07-09 18:21:18,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372237016] [2021-07-09 18:21:18,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:21:18,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:21:18,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:21:18,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=671, Unknown=3, NotChecked=0, Total=756 [2021-07-09 18:21:18,406 INFO L87 Difference]: Start difference. First operand 89456 states and 321235 transitions. Second operand has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:21,104 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 80 [2021-07-09 18:21:21,610 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 102 [2021-07-09 18:21:23,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:21:23,877 INFO L93 Difference]: Finished difference Result 162063 states and 577120 transitions. [2021-07-09 18:21:23,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 18:21:23,878 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:21:23,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:21:24,986 INFO L225 Difference]: With dead ends: 162063 [2021-07-09 18:21:24,986 INFO L226 Difference]: Without dead ends: 162015 [2021-07-09 18:21:24,986 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 3962.2ms TimeCoverageRelationStatistics Valid=386, Invalid=2802, Unknown=4, NotChecked=0, Total=3192 [2021-07-09 18:21:25,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162015 states. [2021-07-09 18:21:27,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162015 to 89481. [2021-07-09 18:21:27,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89481 states, 89480 states have (on average 3.590925346446133) internal successors, (321316), 89480 states have internal predecessors, (321316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:28,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89481 states to 89481 states and 321316 transitions. [2021-07-09 18:21:28,210 INFO L78 Accepts]: Start accepts. Automaton has 89481 states and 321316 transitions. Word has length 37 [2021-07-09 18:21:28,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:21:28,210 INFO L482 AbstractCegarLoop]: Abstraction has 89481 states and 321316 transitions. [2021-07-09 18:21:28,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:28,210 INFO L276 IsEmpty]: Start isEmpty. Operand 89481 states and 321316 transitions. [2021-07-09 18:21:28,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:21:28,335 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:21:28,335 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:21:28,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable687 [2021-07-09 18:21:28,541 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:21:28,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:21:28,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1034978137, now seen corresponding path program 108 times [2021-07-09 18:21:28,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:21:28,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569378324] [2021-07-09 18:21:28,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:21:28,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:21:28,938 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:28,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:21:28,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569378324] [2021-07-09 18:21:28,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569378324] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:28,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486496470] [2021-07-09 18:21:28,938 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:21:28,969 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:21:28,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:21:28,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 18:21:28,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:21:29,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-07-09 18:21:29,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:21:29,079 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:21:29,080 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:21:29,080 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:59, output treesize:58 [2021-07-09 18:21:29,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:29,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-07-09 18:21:29,129 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:21:29,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:21:29,144 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:21:29,144 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:70, output treesize:69 [2021-07-09 18:21:29,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:29,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:29,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:29,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 52 [2021-07-09 18:21:29,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:21:29,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:21:29,255 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:21:29,255 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:87, output treesize:86 [2021-07-09 18:21:29,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:29,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:29,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:29,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 43 [2021-07-09 18:21:29,315 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:21:29,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:21:29,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:29,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:29,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:29,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 34 [2021-07-09 18:21:29,329 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:21:29,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:21:29,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:21:29,335 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:91, output treesize:33 [2021-07-09 18:21:29,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-07-09 18:21:29,441 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:21:29,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:21:29,446 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:21:29,446 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:12 [2021-07-09 18:21:29,768 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-07-09 18:21:29,773 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:29,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486496470] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:29,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:21:29,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-07-09 18:21:29,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768322227] [2021-07-09 18:21:29,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:21:29,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:21:29,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:21:29,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:21:29,773 INFO L87 Difference]: Start difference. First operand 89481 states and 321316 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:32,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:21:32,029 INFO L93 Difference]: Finished difference Result 136272 states and 485934 transitions. [2021-07-09 18:21:32,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:21:32,030 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:21:32,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:21:32,962 INFO L225 Difference]: With dead ends: 136272 [2021-07-09 18:21:32,963 INFO L226 Difference]: Without dead ends: 136239 [2021-07-09 18:21:32,963 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 1168.3ms TimeCoverageRelationStatistics Valid=186, Invalid=1146, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:21:33,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136239 states. [2021-07-09 18:21:35,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136239 to 89480. [2021-07-09 18:21:35,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89480 states, 89479 states have (on average 3.5911331150325774) internal successors, (321331), 89479 states have internal predecessors, (321331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:36,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89480 states to 89480 states and 321331 transitions. [2021-07-09 18:21:36,115 INFO L78 Accepts]: Start accepts. Automaton has 89480 states and 321331 transitions. Word has length 37 [2021-07-09 18:21:36,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:21:36,115 INFO L482 AbstractCegarLoop]: Abstraction has 89480 states and 321331 transitions. [2021-07-09 18:21:36,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:36,115 INFO L276 IsEmpty]: Start isEmpty. Operand 89480 states and 321331 transitions. [2021-07-09 18:21:36,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:21:36,241 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:21:36,241 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:21:36,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable704,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:21:36,442 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:21:36,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:21:36,442 INFO L82 PathProgramCache]: Analyzing trace with hash 783570721, now seen corresponding path program 109 times [2021-07-09 18:21:36,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:21:36,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212218843] [2021-07-09 18:21:36,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:21:36,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:21:36,814 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:36,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:21:36,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212218843] [2021-07-09 18:21:36,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212218843] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:36,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436116486] [2021-07-09 18:21:36,814 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:21:36,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:21:36,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:21:36,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:21:36,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-07-09 18:21:36,932 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:21:36,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:21:36,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:21:36,944 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:48 [2021-07-09 18:21:36,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-07-09 18:21:36,984 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:21:36,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:21:36,998 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:21:36,998 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:53 [2021-07-09 18:21:37,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 40 [2021-07-09 18:21:37,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:21:37,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:21:37,057 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:21:37,057 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:62, output treesize:61 [2021-07-09 18:21:37,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-07-09 18:21:37,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:21:37,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:21:37,204 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:21:37,204 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:67, output treesize:43 [2021-07-09 18:21:37,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-07-09 18:21:37,242 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:21:37,246 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:21:37,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2021-07-09 18:21:37,248 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:21:37,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:21:37,249 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:21:37,250 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:46, output treesize:7 [2021-07-09 18:21:37,274 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:37,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436116486] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:37,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:21:37,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-07-09 18:21:37,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237476525] [2021-07-09 18:21:37,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:21:37,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:21:37,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:21:37,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:21:37,275 INFO L87 Difference]: Start difference. First operand 89480 states and 321331 transitions. Second operand has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:37,777 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-07-09 18:21:40,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:21:40,523 INFO L93 Difference]: Finished difference Result 161746 states and 576431 transitions. [2021-07-09 18:21:40,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:21:40,523 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:21:40,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:21:41,303 INFO L225 Difference]: With dead ends: 161746 [2021-07-09 18:21:41,303 INFO L226 Difference]: Without dead ends: 161713 [2021-07-09 18:21:41,303 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 1616.3ms TimeCoverageRelationStatistics Valid=251, Invalid=1641, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:21:41,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161713 states. [2021-07-09 18:21:44,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161713 to 89423. [2021-07-09 18:21:44,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89423 states, 89422 states have (on average 3.5913645411643667) internal successors, (321147), 89422 states have internal predecessors, (321147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:45,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89423 states to 89423 states and 321147 transitions. [2021-07-09 18:21:45,197 INFO L78 Accepts]: Start accepts. Automaton has 89423 states and 321147 transitions. Word has length 37 [2021-07-09 18:21:45,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:21:45,197 INFO L482 AbstractCegarLoop]: Abstraction has 89423 states and 321147 transitions. [2021-07-09 18:21:45,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:45,197 INFO L276 IsEmpty]: Start isEmpty. Operand 89423 states and 321147 transitions. [2021-07-09 18:21:45,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:21:45,310 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:21:45,311 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:21:45,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable705 [2021-07-09 18:21:45,511 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:21:45,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:21:45,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1387674659, now seen corresponding path program 110 times [2021-07-09 18:21:45,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:21:45,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871294284] [2021-07-09 18:21:45,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:21:45,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:21:46,227 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:46,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:21:46,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871294284] [2021-07-09 18:21:46,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871294284] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:46,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682615083] [2021-07-09 18:21:46,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:21:46,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:21:46,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:21:46,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 18:21:46,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:21:46,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-07-09 18:21:46,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:21:46,331 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:21:46,331 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:21:46,332 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:56 [2021-07-09 18:21:46,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:46,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 39 [2021-07-09 18:21:46,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:21:46,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:21:46,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:21:46,534 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:92, output treesize:90 [2021-07-09 18:21:46,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 45 [2021-07-09 18:21:46,642 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:21:46,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:21:46,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-07-09 18:21:46,653 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:21:46,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:21:46,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2021-07-09 18:21:46,663 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:21:46,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:21:46,669 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:21:46,670 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:77, output treesize:25 [2021-07-09 18:21:46,726 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:21:46,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 39 [2021-07-09 18:21:46,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:21:46,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:21:46,739 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:21:46,740 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:21 [2021-07-09 18:21:46,791 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:46,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682615083] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:46,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:21:46,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-07-09 18:21:46,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704707927] [2021-07-09 18:21:46,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:21:46,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:21:46,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:21:46,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:21:46,792 INFO L87 Difference]: Start difference. First operand 89423 states and 321147 transitions. Second operand has 26 states, 26 states have (on average 2.6923076923076925) internal successors, (70), 25 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:49,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:21:49,131 INFO L93 Difference]: Finished difference Result 90310 states and 323684 transitions. [2021-07-09 18:21:49,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:21:49,149 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6923076923076925) internal successors, (70), 25 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:21:49,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:21:49,522 INFO L225 Difference]: With dead ends: 90310 [2021-07-09 18:21:49,523 INFO L226 Difference]: Without dead ends: 90211 [2021-07-09 18:21:49,523 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 1412.5ms TimeCoverageRelationStatistics Valid=134, Invalid=1056, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:21:49,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90211 states. [2021-07-09 18:21:51,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90211 to 89467. [2021-07-09 18:21:51,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89467 states, 89466 states have (on average 3.5910066393937363) internal successors, (321273), 89466 states have internal predecessors, (321273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:52,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89467 states to 89467 states and 321273 transitions. [2021-07-09 18:21:52,011 INFO L78 Accepts]: Start accepts. Automaton has 89467 states and 321273 transitions. Word has length 37 [2021-07-09 18:21:52,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:21:52,011 INFO L482 AbstractCegarLoop]: Abstraction has 89467 states and 321273 transitions. [2021-07-09 18:21:52,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.6923076923076925) internal successors, (70), 25 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:52,011 INFO L276 IsEmpty]: Start isEmpty. Operand 89467 states and 321273 transitions. [2021-07-09 18:21:52,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:21:52,128 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:21:52,128 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:21:52,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable706,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:21:52,329 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:21:52,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:21:52,329 INFO L82 PathProgramCache]: Analyzing trace with hash -204448505, now seen corresponding path program 111 times [2021-07-09 18:21:52,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:21:52,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319695643] [2021-07-09 18:21:52,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:21:52,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:21:52,654 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:52,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:21:52,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319695643] [2021-07-09 18:21:52,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319695643] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:52,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835060565] [2021-07-09 18:21:52,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:21:52,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:21:52,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:21:52,696 WARN L261 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-09 18:21:52,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:21:52,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-07-09 18:21:52,781 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:21:52,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:21:52,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:21:52,796 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:53 [2021-07-09 18:21:53,400 INFO L354 Elim1Store]: treesize reduction 29, result has 14.7 percent of original size [2021-07-09 18:21:53,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-07-09 18:21:53,401 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:21:53,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:21:53,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:21:53,415 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:65, output treesize:64 [2021-07-09 18:21:53,511 INFO L446 ElimStorePlain]: Different costs {3=[v_C_204], 7=[A, B]} [2021-07-09 18:21:53,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:53,527 INFO L354 Elim1Store]: treesize reduction 31, result has 13.9 percent of original size [2021-07-09 18:21:53,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 49 [2021-07-09 18:21:53,528 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:21:53,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:21:53,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:53,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:53,584 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-07-09 18:21:53,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 61 treesize of output 71 [2021-07-09 18:21:53,588 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:21:53,627 INFO L628 ElimStorePlain]: treesize reduction 54, result has 53.0 percent of original size [2021-07-09 18:21:53,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:53,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:53,652 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:21:53,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 72 [2021-07-09 18:21:53,666 INFO L550 ElimStorePlain]: Start of recursive call 4: 2 dim-0 vars, End of recursive call: and 4 xjuncts. [2021-07-09 18:21:53,694 INFO L628 ElimStorePlain]: treesize reduction 75, result has 34.2 percent of original size [2021-07-09 18:21:53,697 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:21:53,697 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:84, output treesize:39 [2021-07-09 18:21:53,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:53,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:53,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:53,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:53,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:53,922 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:21:53,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 31 treesize of output 63 [2021-07-09 18:21:53,934 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 18:21:53,973 INFO L628 ElimStorePlain]: treesize reduction 63, result has 34.4 percent of original size [2021-07-09 18:21:53,977 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:21:53,978 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:53, output treesize:28 [2021-07-09 18:21:54,041 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:54,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835060565] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:54,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:21:54,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-07-09 18:21:54,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175256676] [2021-07-09 18:21:54,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:21:54,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:21:54,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:21:54,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:21:54,042 INFO L87 Difference]: Start difference. First operand 89467 states and 321273 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:57,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:21:57,773 INFO L93 Difference]: Finished difference Result 90858 states and 325205 transitions. [2021-07-09 18:21:57,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:21:57,774 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:21:57,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:21:58,335 INFO L225 Difference]: With dead ends: 90858 [2021-07-09 18:21:58,335 INFO L226 Difference]: Without dead ends: 90504 [2021-07-09 18:21:58,336 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 2685.3ms TimeCoverageRelationStatistics Valid=349, Invalid=3191, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:21:58,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90504 states. [2021-07-09 18:21:59,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90504 to 89427. [2021-07-09 18:22:00,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89427 states, 89426 states have (on average 3.5913380895936307) internal successors, (321159), 89426 states have internal predecessors, (321159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:00,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89427 states to 89427 states and 321159 transitions. [2021-07-09 18:22:00,772 INFO L78 Accepts]: Start accepts. Automaton has 89427 states and 321159 transitions. Word has length 37 [2021-07-09 18:22:00,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:00,772 INFO L482 AbstractCegarLoop]: Abstraction has 89427 states and 321159 transitions. [2021-07-09 18:22:00,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:00,772 INFO L276 IsEmpty]: Start isEmpty. Operand 89427 states and 321159 transitions. [2021-07-09 18:22:00,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:22:00,904 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:00,904 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:01,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable711 [2021-07-09 18:22:01,104 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:01,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:01,105 INFO L82 PathProgramCache]: Analyzing trace with hash 2071203389, now seen corresponding path program 112 times [2021-07-09 18:22:01,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:01,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881939301] [2021-07-09 18:22:01,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:01,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:01,411 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:01,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:01,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881939301] [2021-07-09 18:22:01,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881939301] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:01,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445121791] [2021-07-09 18:22:01,412 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:01,444 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:22:01,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:22:01,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:22:01,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:01,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-07-09 18:22:01,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:01,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:01,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:01,508 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:34 [2021-07-09 18:22:01,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:22:01,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:22:01,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 37 [2021-07-09 18:22:01,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:01,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:01,606 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:01,606 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:69 [2021-07-09 18:22:01,722 INFO L446 ElimStorePlain]: Different costs {0=[A, B], 5=[v_C_207]} [2021-07-09 18:22:01,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2021-07-09 18:22:01,726 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:01,733 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:01,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2021-07-09 18:22:01,737 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:01,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:01,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:22:01,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:22:01,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:22:01,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 33 [2021-07-09 18:22:01,749 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:01,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:01,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:01,757 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:77, output treesize:31 [2021-07-09 18:22:01,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2021-07-09 18:22:01,790 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:01,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:01,792 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:01,792 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-07-09 18:22:02,095 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:02,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445121791] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:02,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:02,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-07-09 18:22:02,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128804422] [2021-07-09 18:22:02,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:22:02,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:02,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:22:02,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:22:02,096 INFO L87 Difference]: Start difference. First operand 89427 states and 321159 transitions. Second operand has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 21 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:03,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:03,480 INFO L93 Difference]: Finished difference Result 89808 states and 322200 transitions. [2021-07-09 18:22:03,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:22:03,480 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 21 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:22:03,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:03,846 INFO L225 Difference]: With dead ends: 89808 [2021-07-09 18:22:03,846 INFO L226 Difference]: Without dead ends: 89634 [2021-07-09 18:22:03,846 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 609.1ms TimeCoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:22:03,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89634 states. [2021-07-09 18:22:05,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89634 to 89479. [2021-07-09 18:22:05,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89479 states, 89478 states have (on average 3.590994434386106) internal successors, (321315), 89478 states have internal predecessors, (321315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:06,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89479 states to 89479 states and 321315 transitions. [2021-07-09 18:22:06,301 INFO L78 Accepts]: Start accepts. Automaton has 89479 states and 321315 transitions. Word has length 37 [2021-07-09 18:22:06,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:06,301 INFO L482 AbstractCegarLoop]: Abstraction has 89479 states and 321315 transitions. [2021-07-09 18:22:06,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 21 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:06,301 INFO L276 IsEmpty]: Start isEmpty. Operand 89479 states and 321315 transitions. [2021-07-09 18:22:06,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:22:06,422 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:06,422 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:06,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable733,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:06,622 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:06,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:06,623 INFO L82 PathProgramCache]: Analyzing trace with hash -73660215, now seen corresponding path program 113 times [2021-07-09 18:22:06,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:06,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548339085] [2021-07-09 18:22:06,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:07,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:07,459 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:07,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:07,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548339085] [2021-07-09 18:22:07,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548339085] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:07,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235064966] [2021-07-09 18:22:07,459 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:07,490 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:22:07,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:22:07,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 52 conjunts are in the unsatisfiable core [2021-07-09 18:22:07,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:07,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-07-09 18:22:07,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:07,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:07,564 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:07,564 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:45 [2021-07-09 18:22:07,734 INFO L354 Elim1Store]: treesize reduction 76, result has 14.6 percent of original size [2021-07-09 18:22:07,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 181 treesize of output 132 [2021-07-09 18:22:07,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:07,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:07,755 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:07,755 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:184, output treesize:183 [2021-07-09 18:22:08,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:22:08,184 INFO L354 Elim1Store]: treesize reduction 200, result has 7.8 percent of original size [2021-07-09 18:22:08,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 303 treesize of output 209 [2021-07-09 18:22:08,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:08,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:08,208 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:08,208 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:308, output treesize:123 [2021-07-09 18:22:08,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:22:08,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:22:08,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:22:08,297 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:08,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 91 [2021-07-09 18:22:08,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:08,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:08,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:08,337 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:121, output treesize:390 [2021-07-09 18:22:08,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-07-09 18:22:08,451 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:08,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:08,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-07-09 18:22:08,457 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:08,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:08,458 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:08,458 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:46, output treesize:7 [2021-07-09 18:22:08,481 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:08,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235064966] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:08,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:08,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-07-09 18:22:08,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117396091] [2021-07-09 18:22:08,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:22:08,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:08,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:22:08,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:22:08,482 INFO L87 Difference]: Start difference. First operand 89479 states and 321315 transitions. Second operand has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:08,776 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2021-07-09 18:22:13,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:13,445 INFO L93 Difference]: Finished difference Result 136082 states and 485354 transitions. [2021-07-09 18:22:13,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:22:13,445 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:22:13,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:14,079 INFO L225 Difference]: With dead ends: 136082 [2021-07-09 18:22:14,079 INFO L226 Difference]: Without dead ends: 136031 [2021-07-09 18:22:14,080 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 2527.0ms TimeCoverageRelationStatistics Valid=366, Invalid=2826, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:22:14,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136031 states. [2021-07-09 18:22:16,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136031 to 89503. [2021-07-09 18:22:16,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89503 states, 89502 states have (on average 3.590791267234252) internal successors, (321383), 89502 states have internal predecessors, (321383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:17,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89503 states to 89503 states and 321383 transitions. [2021-07-09 18:22:17,193 INFO L78 Accepts]: Start accepts. Automaton has 89503 states and 321383 transitions. Word has length 37 [2021-07-09 18:22:17,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:17,193 INFO L482 AbstractCegarLoop]: Abstraction has 89503 states and 321383 transitions. [2021-07-09 18:22:17,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:17,193 INFO L276 IsEmpty]: Start isEmpty. Operand 89503 states and 321383 transitions. [2021-07-09 18:22:17,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:22:17,338 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:17,338 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:17,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable734 [2021-07-09 18:22:17,538 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:17,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:17,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1617402717, now seen corresponding path program 114 times [2021-07-09 18:22:17,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:17,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75088788] [2021-07-09 18:22:17,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:17,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:17,941 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:17,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:17,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75088788] [2021-07-09 18:22:17,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75088788] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:17,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085992198] [2021-07-09 18:22:17,941 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:17,973 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:22:17,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:22:17,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 18:22:17,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:18,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-07-09 18:22:18,035 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:18,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:18,048 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:18,048 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:56 [2021-07-09 18:22:18,430 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-07-09 18:22:18,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:22:18,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 45 [2021-07-09 18:22:18,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:18,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:18,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:18,508 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:93, output treesize:92 [2021-07-09 18:22:18,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:22:18,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:22:18,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:22:18,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 60 [2021-07-09 18:22:18,660 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:18,677 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:18,678 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:18,678 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:101, output treesize:104 [2021-07-09 18:22:18,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:22:18,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:22:18,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:22:18,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 54 [2021-07-09 18:22:18,747 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:18,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:18,755 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:18,756 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:105, output treesize:68 [2021-07-09 18:22:18,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-07-09 18:22:18,796 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:18,800 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:18,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2021-07-09 18:22:18,801 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:18,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:18,803 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:18,803 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:46, output treesize:5 [2021-07-09 18:22:18,828 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:18,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085992198] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:18,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:18,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-07-09 18:22:18,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754928367] [2021-07-09 18:22:18,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:22:18,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:18,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:22:18,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:22:18,829 INFO L87 Difference]: Start difference. First operand 89503 states and 321383 transitions. Second operand has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:22,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:22,944 INFO L93 Difference]: Finished difference Result 162162 states and 577677 transitions. [2021-07-09 18:22:22,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:22:22,969 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:22:22,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:23,781 INFO L225 Difference]: With dead ends: 162162 [2021-07-09 18:22:23,782 INFO L226 Difference]: Without dead ends: 162103 [2021-07-09 18:22:23,782 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 2604.7ms TimeCoverageRelationStatistics Valid=450, Invalid=2972, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:22:23,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162103 states. [2021-07-09 18:22:26,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162103 to 89497. [2021-07-09 18:22:26,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89497 states, 89496 states have (on average 3.5908308751229105) internal successors, (321365), 89496 states have internal predecessors, (321365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:27,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89497 states to 89497 states and 321365 transitions. [2021-07-09 18:22:27,470 INFO L78 Accepts]: Start accepts. Automaton has 89497 states and 321365 transitions. Word has length 37 [2021-07-09 18:22:27,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:27,470 INFO L482 AbstractCegarLoop]: Abstraction has 89497 states and 321365 transitions. [2021-07-09 18:22:27,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.64) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:27,470 INFO L276 IsEmpty]: Start isEmpty. Operand 89497 states and 321365 transitions. [2021-07-09 18:22:27,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:22:27,634 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:27,634 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:27,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable743,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:27,857 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:27,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:27,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1192455507, now seen corresponding path program 115 times [2021-07-09 18:22:27,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:27,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124355053] [2021-07-09 18:22:27,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:27,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:28,441 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:28,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:28,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124355053] [2021-07-09 18:22:28,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124355053] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:28,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556042593] [2021-07-09 18:22:28,441 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:28,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:28,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:22:28,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:28,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-07-09 18:22:28,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:28,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:28,564 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:28,564 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:34 [2021-07-09 18:22:28,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:22:28,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2021-07-09 18:22:28,727 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:28,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:28,760 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:28,760 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:58, output treesize:55 [2021-07-09 18:22:28,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 45 [2021-07-09 18:22:28,867 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:28,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:28,902 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:28,902 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:74 [2021-07-09 18:22:28,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 46 [2021-07-09 18:22:28,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:28,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:29,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-07-09 18:22:29,002 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:29,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:29,010 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:29,010 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:77, output treesize:22 [2021-07-09 18:22:29,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-07-09 18:22:29,047 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:29,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:29,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:29,050 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:5 [2021-07-09 18:22:29,264 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:29,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556042593] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:29,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:29,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2021-07-09 18:22:29,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871619322] [2021-07-09 18:22:29,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:22:29,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:29,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:22:29,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:22:29,281 INFO L87 Difference]: Start difference. First operand 89497 states and 321365 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:32,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:32,313 INFO L93 Difference]: Finished difference Result 136016 states and 485080 transitions. [2021-07-09 18:22:32,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 18:22:32,313 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:22:32,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:32,959 INFO L225 Difference]: With dead ends: 136016 [2021-07-09 18:22:32,960 INFO L226 Difference]: Without dead ends: 135821 [2021-07-09 18:22:32,960 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 1931.2ms TimeCoverageRelationStatistics Valid=259, Invalid=1547, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:22:33,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135821 states. [2021-07-09 18:22:35,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135821 to 89479. [2021-07-09 18:22:35,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89479 states, 89478 states have (on average 3.590994434386106) internal successors, (321315), 89478 states have internal predecessors, (321315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:36,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89479 states to 89479 states and 321315 transitions. [2021-07-09 18:22:36,211 INFO L78 Accepts]: Start accepts. Automaton has 89479 states and 321315 transitions. Word has length 37 [2021-07-09 18:22:36,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:36,211 INFO L482 AbstractCegarLoop]: Abstraction has 89479 states and 321315 transitions. [2021-07-09 18:22:36,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:36,211 INFO L276 IsEmpty]: Start isEmpty. Operand 89479 states and 321315 transitions. [2021-07-09 18:22:36,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:22:36,357 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:36,357 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:36,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable744,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:36,558 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:36,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:36,558 INFO L82 PathProgramCache]: Analyzing trace with hash -437526489, now seen corresponding path program 116 times [2021-07-09 18:22:36,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:36,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162141786] [2021-07-09 18:22:36,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:36,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:36,846 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:36,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:36,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162141786] [2021-07-09 18:22:36,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162141786] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:36,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724612842] [2021-07-09 18:22:36,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:36,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:22:36,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:22:36,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 18:22:36,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:36,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-07-09 18:22:36,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:36,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:36,947 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:36,947 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:42 [2021-07-09 18:22:37,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:22:37,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 45 [2021-07-09 18:22:37,080 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:37,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:37,099 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:37,099 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:93, output treesize:91 [2021-07-09 18:22:37,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2021-07-09 18:22:37,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:37,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:37,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-07-09 18:22:37,256 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:37,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:37,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 29 [2021-07-09 18:22:37,264 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:37,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:37,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:37,271 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:74, output treesize:30 [2021-07-09 18:22:37,326 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:37,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 41 [2021-07-09 18:22:37,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:22:37,337 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:37,338 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:37,338 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:21 [2021-07-09 18:22:37,385 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:37,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724612842] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:37,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:37,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 18:22:37,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844117877] [2021-07-09 18:22:37,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:22:37,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:37,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:22:37,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:22:37,386 INFO L87 Difference]: Start difference. First operand 89479 states and 321315 transitions. Second operand has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 23 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:39,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:39,207 INFO L93 Difference]: Finished difference Result 90528 states and 324336 transitions. [2021-07-09 18:22:39,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:22:39,208 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 23 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:22:39,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:39,555 INFO L225 Difference]: With dead ends: 90528 [2021-07-09 18:22:39,555 INFO L226 Difference]: Without dead ends: 90354 [2021-07-09 18:22:39,555 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 767.1ms TimeCoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:22:39,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90354 states. [2021-07-09 18:22:41,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90354 to 89533. [2021-07-09 18:22:41,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89533 states, 89532 states have (on average 3.590570969039003) internal successors, (321471), 89532 states have internal predecessors, (321471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:42,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89533 states to 89533 states and 321471 transitions. [2021-07-09 18:22:42,023 INFO L78 Accepts]: Start accepts. Automaton has 89533 states and 321471 transitions. Word has length 37 [2021-07-09 18:22:42,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:42,023 INFO L482 AbstractCegarLoop]: Abstraction has 89533 states and 321471 transitions. [2021-07-09 18:22:42,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 23 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:42,023 INFO L276 IsEmpty]: Start isEmpty. Operand 89533 states and 321471 transitions. [2021-07-09 18:22:42,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:22:42,145 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:42,145 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:42,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable745 [2021-07-09 18:22:42,349 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:42,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:42,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1282486503, now seen corresponding path program 117 times [2021-07-09 18:22:42,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:42,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105216329] [2021-07-09 18:22:42,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:42,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:43,043 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:43,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:43,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105216329] [2021-07-09 18:22:43,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105216329] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:43,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603204903] [2021-07-09 18:22:43,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:43,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:22:43,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:22:43,075 WARN L261 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-09 18:22:43,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:43,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-07-09 18:22:43,139 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:43,155 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:43,156 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:43,156 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:56 [2021-07-09 18:22:43,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:22:43,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 35 [2021-07-09 18:22:43,288 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:43,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:43,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:43,302 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:59, output treesize:62 [2021-07-09 18:22:43,509 INFO L446 ElimStorePlain]: Different costs {0=[v_C_222], 3=[A, B]} [2021-07-09 18:22:43,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 40 [2021-07-09 18:22:43,513 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:43,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:43,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:22:43,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:22:43,544 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:43,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 49 [2021-07-09 18:22:43,545 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:43,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:43,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:22:43,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:22:43,567 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:43,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 36 [2021-07-09 18:22:43,569 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:22:43,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:43,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:43,582 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:82, output treesize:33 [2021-07-09 18:22:43,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:22:43,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:22:43,777 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:43,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 59 [2021-07-09 18:22:43,801 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-07-09 18:22:43,835 INFO L628 ElimStorePlain]: treesize reduction 80, result has 23.8 percent of original size [2021-07-09 18:22:43,837 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:43,838 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:37 [2021-07-09 18:22:43,908 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:43,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603204903] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:43,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:43,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-07-09 18:22:43,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737024524] [2021-07-09 18:22:43,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:22:43,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:43,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:22:43,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:22:43,909 INFO L87 Difference]: Start difference. First operand 89533 states and 321471 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:46,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:46,327 INFO L93 Difference]: Finished difference Result 90017 states and 322761 transitions. [2021-07-09 18:22:46,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:22:46,328 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:22:46,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:46,683 INFO L225 Difference]: With dead ends: 90017 [2021-07-09 18:22:46,683 INFO L226 Difference]: Without dead ends: 89774 [2021-07-09 18:22:46,683 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 1388.3ms TimeCoverageRelationStatistics Valid=151, Invalid=1571, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:22:46,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89774 states. [2021-07-09 18:22:48,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89774 to 89533. [2021-07-09 18:22:48,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89533 states, 89532 states have (on average 3.590570969039003) internal successors, (321471), 89532 states have internal predecessors, (321471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:49,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89533 states to 89533 states and 321471 transitions. [2021-07-09 18:22:49,132 INFO L78 Accepts]: Start accepts. Automaton has 89533 states and 321471 transitions. Word has length 37 [2021-07-09 18:22:49,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:49,132 INFO L482 AbstractCegarLoop]: Abstraction has 89533 states and 321471 transitions. [2021-07-09 18:22:49,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:49,132 INFO L276 IsEmpty]: Start isEmpty. Operand 89533 states and 321471 transitions. [2021-07-09 18:22:49,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:22:49,251 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:49,251 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:49,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable750 [2021-07-09 18:22:49,452 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:49,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:49,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1442450103, now seen corresponding path program 118 times [2021-07-09 18:22:49,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:49,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415006086] [2021-07-09 18:22:49,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:49,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:49,963 WARN L205 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 26 [2021-07-09 18:22:50,244 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:50,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:50,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415006086] [2021-07-09 18:22:50,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415006086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:50,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753160366] [2021-07-09 18:22:50,245 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:50,273 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:22:50,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:22:50,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:22:50,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:50,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-07-09 18:22:50,342 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:50,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:50,353 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:50,354 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:42 [2021-07-09 18:22:50,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2021-07-09 18:22:50,466 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:50,480 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:50,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:50,481 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:56, output treesize:55 [2021-07-09 18:22:50,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 43 [2021-07-09 18:22:50,528 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:50,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:50,545 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:50,545 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:64, output treesize:67 [2021-07-09 18:22:50,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 39 [2021-07-09 18:22:50,645 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:50,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:50,653 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:50,653 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:70, output treesize:43 [2021-07-09 18:22:50,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-07-09 18:22:50,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:50,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:50,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2021-07-09 18:22:50,702 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:50,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:50,703 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:50,703 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:46, output treesize:7 [2021-07-09 18:22:50,726 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:50,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753160366] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:50,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:50,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2021-07-09 18:22:50,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721481848] [2021-07-09 18:22:50,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:22:50,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:50,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:22:50,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:22:50,727 INFO L87 Difference]: Start difference. First operand 89533 states and 321471 transitions. Second operand has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:53,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:22:53,710 INFO L93 Difference]: Finished difference Result 136200 states and 485772 transitions. [2021-07-09 18:22:53,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:22:53,711 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:22:53,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:22:54,634 INFO L225 Difference]: With dead ends: 136200 [2021-07-09 18:22:54,634 INFO L226 Difference]: Without dead ends: 136133 [2021-07-09 18:22:54,634 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 1923.2ms TimeCoverageRelationStatistics Valid=260, Invalid=1996, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:22:54,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136133 states. [2021-07-09 18:22:56,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136133 to 89611. [2021-07-09 18:22:57,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89611 states, 89610 states have (on average 3.589967637540453) internal successors, (321697), 89610 states have internal predecessors, (321697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:57,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89611 states to 89611 states and 321697 transitions. [2021-07-09 18:22:57,436 INFO L78 Accepts]: Start accepts. Automaton has 89611 states and 321697 transitions. Word has length 37 [2021-07-09 18:22:57,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:22:57,436 INFO L482 AbstractCegarLoop]: Abstraction has 89611 states and 321697 transitions. [2021-07-09 18:22:57,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:22:57,436 INFO L276 IsEmpty]: Start isEmpty. Operand 89611 states and 321697 transitions. [2021-07-09 18:22:57,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:22:57,554 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:22:57,554 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:22:57,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable766,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:57,756 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:22:57,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:22:57,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1733721901, now seen corresponding path program 119 times [2021-07-09 18:22:57,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:22:57,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373988092] [2021-07-09 18:22:57,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:22:57,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:22:58,559 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:58,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:22:58,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373988092] [2021-07-09 18:22:58,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373988092] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:58,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119460741] [2021-07-09 18:22:58,560 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:22:58,590 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:22:58,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:22:58,591 WARN L261 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-09 18:22:58,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:22:58,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-07-09 18:22:58,654 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:58,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:58,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:58,667 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:54 [2021-07-09 18:22:58,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:22:58,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:22:58,866 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-09 18:22:58,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 52 [2021-07-09 18:22:58,867 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:58,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:58,888 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:58,888 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:94, output treesize:93 [2021-07-09 18:22:59,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:22:59,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:22:59,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:22:59,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:22:59,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:22:59,043 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-09 18:22:59,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 66 [2021-07-09 18:22:59,044 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:59,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:59,063 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:59,064 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:99, output treesize:98 [2021-07-09 18:22:59,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-07-09 18:22:59,211 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:59,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:59,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2021-07-09 18:22:59,226 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:22:59,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:59,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:22:59,236 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:80, output treesize:37 [2021-07-09 18:22:59,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:22:59,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:22:59,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:22:59,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:22:59,330 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:22:59,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 29 treesize of output 83 [2021-07-09 18:22:59,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-07-09 18:22:59,637 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 21 [2021-07-09 18:22:59,638 INFO L628 ElimStorePlain]: treesize reduction 597, result has 4.3 percent of original size [2021-07-09 18:22:59,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:22:59,640 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:21 [2021-07-09 18:22:59,698 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:22:59,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119460741] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:22:59,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:22:59,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-07-09 18:22:59,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582070688] [2021-07-09 18:22:59,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:22:59,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:22:59,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:22:59,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:22:59,699 INFO L87 Difference]: Start difference. First operand 89611 states and 321697 transitions. Second operand has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:03,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:23:03,317 INFO L93 Difference]: Finished difference Result 136569 states and 486663 transitions. [2021-07-09 18:23:03,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 18:23:03,318 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:23:03,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:23:03,940 INFO L225 Difference]: With dead ends: 136569 [2021-07-09 18:23:03,940 INFO L226 Difference]: Without dead ends: 136377 [2021-07-09 18:23:03,940 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 2667.5ms TimeCoverageRelationStatistics Valid=356, Invalid=2506, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 18:23:04,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136377 states. [2021-07-09 18:23:06,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136377 to 89593. [2021-07-09 18:23:06,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89593 states, 89592 states have (on average 3.5900861684078937) internal successors, (321643), 89592 states have internal predecessors, (321643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:07,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89593 states to 89593 states and 321643 transitions. [2021-07-09 18:23:07,461 INFO L78 Accepts]: Start accepts. Automaton has 89593 states and 321643 transitions. Word has length 37 [2021-07-09 18:23:07,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:23:07,462 INFO L482 AbstractCegarLoop]: Abstraction has 89593 states and 321643 transitions. [2021-07-09 18:23:07,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:07,462 INFO L276 IsEmpty]: Start isEmpty. Operand 89593 states and 321643 transitions. [2021-07-09 18:23:07,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:23:07,612 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:23:07,613 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:23:07,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable767 [2021-07-09 18:23:07,829 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:23:07,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:23:07,829 INFO L82 PathProgramCache]: Analyzing trace with hash -215989977, now seen corresponding path program 120 times [2021-07-09 18:23:07,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:23:07,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591912743] [2021-07-09 18:23:07,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:23:07,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:23:08,347 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:08,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:23:08,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591912743] [2021-07-09 18:23:08,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591912743] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:08,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316499319] [2021-07-09 18:23:08,348 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:23:08,388 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:23:08,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:23:08,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 18:23:08,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:23:08,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-07-09 18:23:08,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:08,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:08,472 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:08,472 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:40 [2021-07-09 18:23:08,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2021-07-09 18:23:08,618 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:08,636 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:08,637 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:08,637 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:56, output treesize:53 [2021-07-09 18:23:08,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:08,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:08,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 34 [2021-07-09 18:23:08,756 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:08,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:08,783 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:23:08,783 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:68, output treesize:67 [2021-07-09 18:23:08,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:08,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:08,905 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:08,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 56 [2021-07-09 18:23:08,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:08,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:09,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:09,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:09,171 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:09,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 88 [2021-07-09 18:23:09,203 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-09 18:23:09,305 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2021-07-09 18:23:09,305 INFO L628 ElimStorePlain]: treesize reduction 82, result has 59.0 percent of original size [2021-07-09 18:23:09,341 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:23:09,341 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:78, output treesize:93 [2021-07-09 18:23:09,625 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_8, v_prenex_9, v_prenex_10, v_prenex_11], 3=[C]} [2021-07-09 18:23:09,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2021-07-09 18:23:09,632 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:09,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:09,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2021-07-09 18:23:09,696 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:09,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:09,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 18 [2021-07-09 18:23:09,754 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:09,834 INFO L628 ElimStorePlain]: treesize reduction 10, result has 90.7 percent of original size [2021-07-09 18:23:09,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-07-09 18:23:09,838 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:09,876 INFO L628 ElimStorePlain]: treesize reduction 20, result has 72.6 percent of original size [2021-07-09 18:23:09,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:09,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:09,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:23:09,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-07-09 18:23:09,881 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:09,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:09,896 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 5 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:23:09,896 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:158, output treesize:31 [2021-07-09 18:23:10,005 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:10,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316499319] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:10,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:23:10,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-07-09 18:23:10,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019158816] [2021-07-09 18:23:10,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:23:10,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:23:10,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:23:10,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:23:10,006 INFO L87 Difference]: Start difference. First operand 89593 states and 321643 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:12,506 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-07-09 18:23:14,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:23:14,316 INFO L93 Difference]: Finished difference Result 136579 states and 486831 transitions. [2021-07-09 18:23:14,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 18:23:14,317 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:23:14,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:23:14,979 INFO L225 Difference]: With dead ends: 136579 [2021-07-09 18:23:14,979 INFO L226 Difference]: Without dead ends: 136446 [2021-07-09 18:23:14,979 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 2396.0ms TimeCoverageRelationStatistics Valid=316, Invalid=2546, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 18:23:15,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136446 states. [2021-07-09 18:23:17,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136446 to 89575. [2021-07-09 18:23:17,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89575 states, 89574 states have (on average 3.59024940272847) internal successors, (321593), 89574 states have internal predecessors, (321593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:18,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89575 states to 89575 states and 321593 transitions. [2021-07-09 18:23:18,152 INFO L78 Accepts]: Start accepts. Automaton has 89575 states and 321593 transitions. Word has length 37 [2021-07-09 18:23:18,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:23:18,152 INFO L482 AbstractCegarLoop]: Abstraction has 89575 states and 321593 transitions. [2021-07-09 18:23:18,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:18,152 INFO L276 IsEmpty]: Start isEmpty. Operand 89575 states and 321593 transitions. [2021-07-09 18:23:18,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:23:18,294 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:23:18,294 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:23:18,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable811,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:23:18,498 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:23:18,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:23:18,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1158927161, now seen corresponding path program 121 times [2021-07-09 18:23:18,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:23:18,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345263427] [2021-07-09 18:23:18,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:23:18,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:23:18,873 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:18,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:23:18,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345263427] [2021-07-09 18:23:18,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345263427] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:18,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232976935] [2021-07-09 18:23:18,874 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:23:18,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:23:18,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:23:18,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:23:18,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-07-09 18:23:18,944 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:18,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:18,955 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:18,956 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-07-09 18:23:19,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:19,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2021-07-09 18:23:19,019 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:19,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:19,034 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:19,034 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:58, output treesize:57 [2021-07-09 18:23:19,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2021-07-09 18:23:19,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:19,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:19,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-07-09 18:23:19,206 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:19,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:19,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 29 [2021-07-09 18:23:19,213 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:19,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:19,219 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:19,219 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:71, output treesize:22 [2021-07-09 18:23:19,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-07-09 18:23:19,550 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:19,551 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:19,551 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:19,552 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:5 [2021-07-09 18:23:19,571 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:19,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232976935] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:19,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:23:19,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-07-09 18:23:19,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994137154] [2021-07-09 18:23:19,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:23:19,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:23:19,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:23:19,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:23:19,572 INFO L87 Difference]: Start difference. First operand 89575 states and 321593 transitions. Second operand has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:22,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:23:22,021 INFO L93 Difference]: Finished difference Result 123300 states and 436703 transitions. [2021-07-09 18:23:22,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 18:23:22,021 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:23:22,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:23:22,841 INFO L225 Difference]: With dead ends: 123300 [2021-07-09 18:23:22,842 INFO L226 Difference]: Without dead ends: 123171 [2021-07-09 18:23:22,842 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1633.5ms TimeCoverageRelationStatistics Valid=219, Invalid=1503, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:23:22,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123171 states. [2021-07-09 18:23:25,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123171 to 89687. [2021-07-09 18:23:25,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89687 states, 89686 states have (on average 3.5898021987824187) internal successors, (321955), 89686 states have internal predecessors, (321955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:25,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89687 states to 89687 states and 321955 transitions. [2021-07-09 18:23:25,977 INFO L78 Accepts]: Start accepts. Automaton has 89687 states and 321955 transitions. Word has length 37 [2021-07-09 18:23:25,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:23:25,977 INFO L482 AbstractCegarLoop]: Abstraction has 89687 states and 321955 transitions. [2021-07-09 18:23:25,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:25,977 INFO L276 IsEmpty]: Start isEmpty. Operand 89687 states and 321955 transitions. [2021-07-09 18:23:26,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:23:26,147 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:23:26,147 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:23:26,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable831 [2021-07-09 18:23:26,348 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:23:26,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:23:26,348 INFO L82 PathProgramCache]: Analyzing trace with hash -985936443, now seen corresponding path program 122 times [2021-07-09 18:23:26,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:23:26,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637656797] [2021-07-09 18:23:26,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:23:26,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:23:26,747 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:26,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:23:26,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637656797] [2021-07-09 18:23:26,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637656797] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:26,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466501218] [2021-07-09 18:23:26,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:23:26,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:23:26,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:23:26,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:23:26,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:23:26,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-07-09 18:23:26,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:26,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:26,831 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:26,831 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-07-09 18:23:26,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:26,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2021-07-09 18:23:26,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:26,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:26,912 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:26,912 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:58, output treesize:53 [2021-07-09 18:23:27,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 50 [2021-07-09 18:23:27,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:27,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:27,050 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:27,050 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:71, output treesize:74 [2021-07-09 18:23:27,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 46 [2021-07-09 18:23:27,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:27,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:27,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:27,110 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:77, output treesize:43 [2021-07-09 18:23:27,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-07-09 18:23:27,151 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:27,155 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:27,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2021-07-09 18:23:27,157 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:27,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:27,158 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:27,158 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:46, output treesize:7 [2021-07-09 18:23:27,181 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:27,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466501218] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:27,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:23:27,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-07-09 18:23:27,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567610536] [2021-07-09 18:23:27,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:23:27,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:23:27,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:23:27,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:23:27,182 INFO L87 Difference]: Start difference. First operand 89687 states and 321955 transitions. Second operand has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:27,734 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-07-09 18:23:30,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:23:30,719 INFO L93 Difference]: Finished difference Result 117694 states and 416889 transitions. [2021-07-09 18:23:30,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 18:23:30,720 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:23:30,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:23:31,266 INFO L225 Difference]: With dead ends: 117694 [2021-07-09 18:23:31,266 INFO L226 Difference]: Without dead ends: 117568 [2021-07-09 18:23:31,266 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 2140.5ms TimeCoverageRelationStatistics Valid=404, Invalid=2352, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 18:23:31,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117568 states. [2021-07-09 18:23:33,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117568 to 89901. [2021-07-09 18:23:33,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89901 states, 89900 states have (on average 3.589154616240267) internal successors, (322665), 89900 states have internal predecessors, (322665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:34,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89901 states to 89901 states and 322665 transitions. [2021-07-09 18:23:34,414 INFO L78 Accepts]: Start accepts. Automaton has 89901 states and 322665 transitions. Word has length 37 [2021-07-09 18:23:34,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:23:34,414 INFO L482 AbstractCegarLoop]: Abstraction has 89901 states and 322665 transitions. [2021-07-09 18:23:34,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:23:34,415 INFO L276 IsEmpty]: Start isEmpty. Operand 89901 states and 322665 transitions. [2021-07-09 18:23:34,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:23:34,570 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:23:34,570 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:23:34,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable832 [2021-07-09 18:23:34,770 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:23:34,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:23:34,771 INFO L82 PathProgramCache]: Analyzing trace with hash -2104731735, now seen corresponding path program 123 times [2021-07-09 18:23:34,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:23:34,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89858153] [2021-07-09 18:23:34,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:23:34,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:23:35,185 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:35,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:23:35,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89858153] [2021-07-09 18:23:35,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89858153] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:35,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583801833] [2021-07-09 18:23:35,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:23:35,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:23:35,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:23:35,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 52 conjunts are in the unsatisfiable core [2021-07-09 18:23:35,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:23:35,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-07-09 18:23:35,269 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:35,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:35,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:35,279 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:35 [2021-07-09 18:23:35,347 INFO L354 Elim1Store]: treesize reduction 29, result has 14.7 percent of original size [2021-07-09 18:23:35,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-07-09 18:23:35,348 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:35,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:35,360 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:23:35,360 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:54 [2021-07-09 18:23:35,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:35,599 INFO L354 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2021-07-09 18:23:35,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 50 treesize of output 60 [2021-07-09 18:23:35,601 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:35,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:35,635 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:23:35,635 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:93, output treesize:99 [2021-07-09 18:23:35,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:35,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:35,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:35,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:35,861 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:35,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 76 [2021-07-09 18:23:35,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:35,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:35,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:35,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:35,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:35,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:35,928 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:35,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 58 [2021-07-09 18:23:36,208 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:23:36,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:36,231 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-09 18:23:36,231 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:93, output treesize:48 [2021-07-09 18:23:36,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2021-07-09 18:23:36,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:36,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:36,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:36,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:36,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:23:36,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:23:36,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:23:36,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-07-09 18:23:36,326 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:23:36,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:23:36,342 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:23:36,342 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:69, output treesize:26 [2021-07-09 18:23:36,434 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:23:36,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583801833] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:23:36,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:23:36,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 27 [2021-07-09 18:23:36,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391972814] [2021-07-09 18:23:36,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:23:36,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:23:36,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:23:36,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=662, Unknown=4, NotChecked=0, Total=756 [2021-07-09 18:23:36,435 INFO L87 Difference]: Start difference. First operand 89901 states and 322665 transitions. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-07-09 18:23:37,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:23:37,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable833 [2021-07-09 18:23:37,905 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-09 18:23:37,909 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-09 18:23:37,912 WARN L196 ceAbstractionStarter]: Timeout [2021-07-09 18:23:37,912 INFO L202 PluginConnector]: Adding new model three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.07 06:23:37 BasicIcfg [2021-07-09 18:23:37,912 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-09 18:23:37,912 INFO L168 Benchmark]: Toolchain (without parser) took 675787.50 ms. Allocated memory was 188.7 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 168.7 MB in the beginning and 4.8 GB in the end (delta: -4.7 GB). Peak memory consumption was 3.1 GB. Max. memory is 8.0 GB. [2021-07-09 18:23:37,912 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 188.7 MB. Free memory is still 170.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 18:23:37,913 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.40 ms. Allocated memory is still 188.7 MB. Free memory was 168.7 MB in the beginning and 167.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 18:23:37,913 INFO L168 Benchmark]: Boogie Preprocessor took 20.31 ms. Allocated memory is still 188.7 MB. Free memory was 167.2 MB in the beginning and 166.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 18:23:37,913 INFO L168 Benchmark]: RCFGBuilder took 380.38 ms. Allocated memory is still 188.7 MB. Free memory was 166.1 MB in the beginning and 151.9 MB in the end (delta: 14.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-07-09 18:23:37,913 INFO L168 Benchmark]: TraceAbstraction took 675353.76 ms. Allocated memory was 188.7 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 151.3 MB in the beginning and 4.8 GB in the end (delta: -4.7 GB). Peak memory consumption was 3.1 GB. Max. memory is 8.0 GB. [2021-07-09 18:23:37,913 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 188.7 MB. Free memory is still 170.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 20.40 ms. Allocated memory is still 188.7 MB. Free memory was 168.7 MB in the beginning and 167.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 20.31 ms. Allocated memory is still 188.7 MB. Free memory was 167.2 MB in the beginning and 166.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 380.38 ms. Allocated memory is still 188.7 MB. Free memory was 166.1 MB in the beginning and 151.9 MB in the end (delta: 14.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 675353.76 ms. Allocated memory was 188.7 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 151.3 MB in the beginning and 4.8 GB in the end (delta: -4.7 GB). Peak memory consumption was 3.1 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 71]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (89901states) and FLOYD_HOARE automaton (currently 24 states, 28 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 43 known predicates. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 675262.8ms, OverallIterations: 131, TraceHistogramMax: 3, EmptinessCheckTime: 11376.5ms, AutomataDifference: 264218.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 46.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 5826 SDtfs, 26231 SDslu, 51656 SDs, 0 SdLazy, 124267 SolverSat, 5314 SolverUnsat, 18 SolverUnknown, 0 SolverNotchecked, 77046.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7374 GetRequests, 3212 SyntacticMatches, 157 SemanticMatches, 4004 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43476 ImplicationChecksByTransitivity, 131856.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=151324occurred in iteration=69, InterpolantAutomatonStates: 3223, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 210602.0ms AutomataMinimizationTime, 130 MinimizatonAttempts, 1919220 StatesRemovedByMinimization, 130 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 969.1ms SsaConstructionTime, 3054.3ms SatisfiabilityAnalysisTime, 155873.1ms InterpolantComputationTime, 8326 NumberOfCodeBlocks, 8319 NumberOfCodeBlocksAsserted, 507 NumberOfCheckSat, 8070 ConstructedInterpolants, 208 QuantifiedInterpolants, 215402 SizeOfPredicates, 740 NumberOfNonLiveVariables, 11835 ConjunctsInSsa, 4053 ConjunctsInUnsatCore, 256 InterpolantComputations, 6 PerfectInterpolantSequences, 610/5181 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown